Yes, the substance becomes the part of filtrate. No, the molecule does not become part of the filtrate.
What is filtrate?The most common example is making tea. While preparing tea, a filter or a sieve is used to separate tea leaves from the water. Through the sieve pores, only water will pass. The liquid which has obtained after filtration is called the filtrate; in this case, water is the filtrate.
Which substance becomes the part of the filtrate?The substances that are normally found in the filtrate are plasma components (such as water, nutrients, dissolved gases, electrolytes, and metabolic wastes) excluding plasma proteins and blood cells.
Why molecule becomes the part of the filtrate?Proteins are large molecules that cannot pass the wall of capillaries during filtration, hence, this molecule is not normally part of the filtrate.
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Replace this sample text with the prompt or directions for this item.
The atomic number of an element is the number of
The atomic mass is the number of
The electrons in the outermost shell are known as the
protons protons and neutrons
valence electrons
Answer:
1. Protons
2. Protons and Neutrons
3. Valence electrons
Explanation:
what mass of potassium nitrate can be produced from the reaction of 30.00ml of 0.10m nitric acid with 15.00ml of 0.25m potassium carbonate?
0.28986 M mass of potassium nitrate can be produced from the reaction of 30.00ml of 0.10m nitric acid with 15.00ml of 0.25m potassium carbonate
V₁S₁ = V₂S₂ ( V₁ is the volume of acid ,S₁ is the strength of acid, V₂ is the volume of base , S₂ is the strength of base)
So, S1= V2S2 /V1
Putting the values ;
S1= V2S2 /V1
=> S1 = (32.58×0.08897)/10.00
=> S1 = 0.28986
concentration of solution of phosphoric acid = 0.28986 M
One or more chemicals, sometimes referred to as reactants, are changed into one or more new substances, referred to as products, during a chemical reaction. Chemical elements and compounds are both substances. reacting in action, procedure, or example. opposition to a movement, power, or effect The transformation of one or more chemicals into one or more other compounds is known as a chemical reaction. Examples include how rust is created when iron and oxygen combine. Making sodium acetate, carbon dioxide, and water from vinegar and baking soda. Exploding or burning items
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potassium sulfate and calcium chloride
Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTION if no reaction occurs.
Potassium sulfate and Calcium chloride reacts with each other to form Potassium chloride and Calcium sulphate. The chemical yield in this process is about 99%.
The balanced chemical reaction for the reaction of Potassium sulfate and Calcium chloride is given as:
CaCl₂ + K₂SO₄ → CaSO₄ + 2KCl
The reaction between Potassium sulfate and Calcium chloride is a double displacement type of reaction.
Double displacement reaction is a type of reaction where one part of the reactant is replaced by the another part of the reactant.
The general form of double displacement reaction is written as:
AB + CD → AD + BC
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ice cubes are added to an insulated cup of hot water. as a result, the temperature of the water decreases and the ice melts. what statement best explains the change in entropy of the system, which is the combination of water and ice cubes, on a molecular level?
The entropy of the system increases according to increase entropy principle
The Increase in Entropy Principle states that for any process the total change in entropy of a system together with its enclosing adiabatic surroundings is always greater than or equal to zero.
The measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder, or randomness, of a system.
So hence when ice cubes are added into a insulated cup of hot water it decreases the temperature and the ice melts
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Water is a polar solvent and carbon tetrachloride (CCl4) is a nonpolar solvent. In which solvent is each of the following more likely to be soluble?a. NaNO3, ionicb. I2, nonpolarc. sucrose (table sugar), polard. gasoline, nonpolare. vegetable oil, nonpolarf. benzene, nonpolarg. LiCl, ionich. Na2SO4, ionic
One of the first ten compounds, carbon tetrachloride, is used in a variety of industrial manufacturing processes as well as in consumer products such as paints, adhesives, degreasers, and other things.
How about a summary of carbon tetrachloride?An organic molecule called carbon tetrachloride is made up of a core carbon atom that is encircled by four chlorine atoms arranged in a tetrahedron. Because of its extremely low melting point, it is found as a colorless liquid at ambient temperature. It has a wide range of uses, including in cleaning supplies, fire extinguishers, and fumigants. It has been discovered that large amounts of it can have negative health effects.
A substance's solubility refers to its capacity to dissolve in a certain solvent. The fundamental solubility rule tells us whether a given item dissolves in
It is a clear liquid that has a faintly perceptible sweet odor. It is also known as benziform, perchloromethane, methane tetrachloride, carbon chloride, and methane tetrachloride. The most common way to encounter carbon tetrachloride is as a colorless gas in the air. Both its inflammability and ease of dissolution in water are nonexistent.
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What kind of light is absorbed by greenhouse gases like CO2 to cause warming of the atmosphere?
The kind of light absorbed by greenhouse gases that causes the warming of the atmosphere is infrared light.
What is global warming?Global warming refers to the increase in the average global temperature as a result of an increased amount of absorbed infrared light by greenhouse gases.
Greenhouse gases are gases that form a blanket layer in the atmosphere and prevent reflected low-energy infrared light from the sun from returning back to space. By absorbing this light, greenhouse gases are able to keep the earth warm.
However, as the concentration of greenhouse gases keeps increasing in the atmosphere, so is the amount of infrared light absorbed. Consequently, the atmosphere keeps getting warmer. The more the concentration of the gases increases, the more the temperature.
This is what is currently causing global warming.
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How many electrons are located in the outermost orbit in the bohr model of a boron atom?.
The number electrons in the outermost orbit in the Bohr model of a Boron atom is 3. The outermost orbit of the electrons of a Boron atom is in the L-shell.
What is Bohr model?The Bohr model is a structural model of an atom where the electrons revolve around the nucleus of an atom in distinct circular orbits (shells). Each shell has a maximum number of electrons by this formula: 2n², where n is the principal quantum numbers (n = 1, 2, 3, 4, ...).
The 1st orbit called K-shell has the maximum electrons 2(1)² = 2.The 2nd orbit called L-shell has the maximum electrons 2(2)² = 8.The 3rd orbit called M-shell has the maximum electrons 2(3)² = 18.The 4th orbit called N-shell has the maximum electrons 2(4)² = 32.The 5th orbit called O-shell has the maximum electrons 2(5)² = 50.The composition of numbers of electrons in each shell of an atom is called electronic configuration.
Boron is an atom with the atomic number 5. So, it has 5 electrons. The electronic configuration is
K-shell = 2 electronsL-shell = 3 electronsL-shell is the outermost orbit in the Bohr model of a Boron atom.
Hence, the number of electrons in the outermost orbit in the Bohr model of a Boron atom is 3.
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hydrocarbons with double bonds do not have free rotation around the double bond. this is most closely related to:
This is closely related to pi bonds in double and triple bonds prevent these bonds from rotating.
This rigidity has an effect on the physical structure of compounds and can influence chemical reactivity. Here double bonds contain pie orbitals, they are not free to rotate.
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Which element has the ground state electronic configuration, 1s22s22p63s23p64s1 ?.
The given electronic configuration is of Potassium.
The electron configuration in atomic physics and quantum chemistry refers to the arrangement of electrons in orbitals around an atomic nucleus or the distribution of electrons within an atom or molecule.
One orbital can house a maximum of two electrons, and there are four different types of orbitals (s, p, d, and f). More electrons can be held in the p, d, and f orbitals since they contain various sub levels.
Thus, the given atomic configuration is 1s²,2s²,2p⁶,3s²,3p⁶4s¹.
by counting the number of electrons present in orbitals we can find out the atomic number of the atom because ,
no of electrons present = atomic number
thus, no of electrons = 2+2+6+2+6+1=19
the element with atomic number 19 is potassium.
thus, the given electronic configuration is of potassium.
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in order to create a 0.500 m 0.500 m solution of h c l hcl for use in a laboratory experiment, how much distilled water must be used to dilute 100 ml 100 ml of a 3.00 m h c l 3.00 m hcl solution?
For the necessary concentration, 500 ml distilled water must be added here.
Can we drink distilled water?You can consume distilled water, of course. Because it is flatter and less flavored as tap and bottled waters, you might not enjoy the taste. Businesses boil water, collect the steam, and then condense the liquid back to liquid to create distilled water. Minerals and pollutants are taken out of the water by this method.
Briefing:
Molarity= Volume /Moles
Moles of HCl present =100×10 −3 ×3=0.3
Required molarity =0.5
∴0.5= Volume /0.3
∴Volume=0.6 L=600 mL
Here, 600 mL total, 100 mL at the beginning
For the necessary concentration, 500 ml distilled water must be added here.
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hydroxylamine contains 42.41% n and 9.15% h by mass, with the remainder being oxygen. what is its empirical formula?
The empirical formula of hydroxylamine is Nitrogen 1, Hydrogen 3 and oxygen 1 (N1H3O1).
To find the empirical formula, we must first figure out the amount of oxygen present, which is equal to 100 minus the percentages of nitrogen and hydrogen present. Combining the values gives us the following outcome: The amount of oxygen present is expressed as 100 minus 42.41 and 9.15, which equals 48.44. Nitrogen is 42.41, contains 9.15 percent hydrogen, and has 48.44 percent oxygen. The smallest amount will be shared. When divided by 3.0275 and 3.0229, respectively, the least nitrogen value will equal nearly 1, which is nitrogen. 9.15 divided by 3.0275 = 3, and 3.0275 divided by 3.0275 equals 1 for oxygen and hydrogen. The nitrogen concentration in this instance is 1. 3. 1 points are needed to compare hydrogen to oxygen.
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40. Consider the following unbalanced equation.
FeCl₂ + Na₂CO3 → FeCO3 + NaCl
When the equation is completely balanced
using smallest whole numbers, the coefficient
of NaCl is
(1) 6 (2) 2
41. Consider the followi
(3) 3
(4) 4
Answer: 2
Explanation: For the equation to be balanced, the elements or compounds from the reactant and product sides must be equal.
Everything else was equal except the Na and Cl which on the reactant side it had 2 molecules each and on the product side 1 molecule.
All you have to do is add 2 Infront of NaCl on the product side to make the reaction balance.
in a mixture of an alcohol and ketone of equal molecular weight, which will have the larger rf value and why?
The ketone will have a larger rf value because it is more polar than the alcohol.
Does more polarity suggest a greater or lesser Rf value?
Calculating the Rf value is possible if you can see the spots.The identity and properties of the various compounds can be established using the Rf values.Since more polar compounds have a stronger affinity for the polar solid phase, they will have smaller Rf values.Rf values are typically higher for low-polarity chemicals compared to higher-polarity ones. Generally speaking, as the polarity of a compound increases, so does its absorptivity (i.e., the more polar the compound, the stronger it binds to the adsorbent).To learn more about Rf values, follow the link https://brainly.com/question/26639192
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an important intermediate reaction in the industrial production process of nitric acid is shown. what is the theoretical yield of h2o (18.02 g/mol) if 45.0 kg of nh3 (17.04 g/mol) reacts with excess o2 (32.00 g/mol)?
The theoretical yield of H₂O in this reaction is 31.69 Kg.
The chemical equation of the reaction of NH₃ and O₂ is,
NH₃ + O₂ → NO + H₂O
Now, balancing this equation,
4NH₃ + 5O₂ → 4NO + 6H₂O
So, as per reaction, we can see,
NH₃ is limiting reagent, hence it will decide the extent of products,
4 moles of NH₃ reacts completely with two oxygen to form 6 moles of water.
Moles = Mass reacted/formed/molar mass.
Molar mass of NH₃ = 17.04 g/mol
Reacted mass of NH₃ = 45000 g.
Molar mass of H₂O is 18 g/mol
Now, can write,
4 x (mass of NH₃ reacted/molar mass of NH₃) = 6 x (mass of H₂O formed/molar mass of H₂O)
4 x (45000/17.04) = 6 x (Formed mass of H₂O/18)
Formed mass of H₂O = 31690.14 grams.
Formed mass of H₂O = 31.69 Kg.
So, the theoretical yield of H₂O is 31.69 Kg.
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an ammonia buffer solution contains 0.18 m nh4 and 0.27 m nh3. the pka of ammonium is 9.24. what is the ph of the buffer?
An ammonia buffer solution contains 0.18 m NH₄ and 0.27 m NH₃ the pka of ammonium is 9.24 and the pH of the buffer is 9.41
pH means a measure of how acidic or basic a substances or solution
Here given data is
Pka of NH₄ = 9.24
Concentration of NH₄ = 0.18 M
Concentration of NH₃ = 0.27 M
Then we have to calculate pH =?
The pH of buffer solution can obtain by using the Henderson Hassel Bach equation
pH = Pka + log [base]/[acid]
pH = 9.24 + log [NH₃]/[NH₄]
pH = 9.24 + log [0.27 M[/[ 0.18 M]
pH = 9.24 + log [1.5]
pH = 9.24 + 0.176
pH = 9.41
pH of the buffer is 9.41
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a 30.0 g sample of water at a temperature of 280.0 k is mixed with 50.0 g of water at 330.0 k. what is the final temperature of the mixture (in kelvin) assuming that no heat is lost to the surroundings? (enter the numerical answer only; do not enter a unit.)
The final temperature after mixing these solutions will be 311K.
This can be calculated using formula:
q = m⋅c⋅(change in temperature)
−q (lost) = q (gained)
This is equivalent to
−50.0g⋅ (T−330)K = 30.0g⋅ (T-280)K
−50⋅T+16500 =30⋅T−8400
80.0⋅T = 24900
T = 311.25 K
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PLS HELP!
How are names for ionic compounds with transition metals different from those without transition metals?
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, ionic compounds with transition metals and ionic compounds without transition metals are named in the same way.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Ionic compounds with transition metals are named with the same method as compounds without transition metals, except the charge of the metal ion is specified by a Roman numeral in parentheses after the name of the metal.
Therefore, ionic compounds with transition metals and ionic compounds without transition metals are named in the same way.
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11) the compound: a) is considered a d sugar. b) has 3 chiral carbons. c) is considered an aldose sugar d) all of the above are correct e) none of the above are correct
The compound: d) all of the above are correct ( considered a d sugar, has 3 chiral carbons, is considered an aldose )
As a general rule, chiral carbon centres are carbon atoms positioned at the four corners of a tetrahedron and attached to four distinct substituents. Steeogenic carbons and asymmetrical carbon atoms are other names for chiral carbon atoms. The definition of an aldose is a monosaccharide (simple sugar) with a carbon backbone chain, an aldehyde group on the carbon atom at the end, and hydroxyl groups connected to all of the other carbon atoms. Aldoses differ from ketoses, which are considered ketones because they have the carbonyl group away from the end of the molecule. The Lobry-de Bruyn-van Ekenstein transition can isomerize aldoses into ketoses.
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if a non-diabetic person ingests carbon in the form of sugar, how is that carbon likely to be released from their body?
If a non-diabetic person ingests carbon in the form of sugar than carbon is likely to be released from their body in the form of CO₂.
The pancreas releases glucagon while the awareness of glucose inside the bloodstream falls too low. Glucagon causes the liver to transform stored glycogen (the multibranched polysaccharide of glucose in frame storage) into glucose, which is released into the bloodstream.
The absorption price of fructose alone from the small gut is slower than that of glucose. this is partially due to the differences in the absorption manner between the two monosaccharides. Glucose is absorbed from the intestine into the plasma thru more than one active glucose co-transporter protein.
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Surprisingly, dipole-diple is not the predominant intermolecular force between ibr molecules in liquid ibr. Based on this information, what must be the main imf for ibr?.
Dipoles are not the dominant intermolecular forces between IBr molecules in liquids. IBr is a covalent bond.
A covalent bond is a chemical bond that requires the sharing of electrons to form electron pairs between atoms. The constant balance between attractive and repulsive forces between atoms according to their share of electrons is called a covalent bond.
Covalent bonds are much more common in natural chemistry than ionic bonds. A covalent bond is the simultaneous attraction of the nucleus to one or more electron pairs. Covalent compounds generally have low boiling and melting factors and are determined in all three body states at room temperature. Covalent bonds no longer conduct electricity; This is because covalent compounds no longer have charged particles that can carry electrons.
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Which type of neuron begins in most body organs and carries information toward the central nervous system?.
Answer:
Afferent or sensory neurons
Explanation:
They collect stimuli received by receptors throughout the body, including the skin, eyes, ears, nose, and tongue as well as pain and other receptors in the internal organs. Sensory information is transmitted to the central nervous system, which includes the brain and spinal cord.
If the following elements were involved in a chemical reaction, which one would be most likely to form a cation?
O nitrogen (N)
potassium (K)
Ofluorine (F)
Ochlorine (CI)
Among elements that are involved in a chemical reaction, one that would be most likely to form a cation is : potassium (K)
Why potassium is cation?In the periodic table, potassium is one of the alkali metals which has a single valence electron in the outer electron shell. This valence electron is easily removed to create an ion with a positive charge that is a cation.
Halogens always form anions whereas alkali metals and alkaline earth metals form cations.
Cl- is an example of anion as Cl- atom is a chlorine atom that has gained one electron and has a negative charge of -1 since it has a full outer shell. A negatively charged ion fluorine is an anion.
Nitrogen is neither a cation nor an anion as it falls in the category of atom and atoms are electrically neutral.
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1.96 g h2 is allowed to react with 9.78 g n2 , producing 1.46 g nh3 . part a what is the theoretical yield in grams for this reaction under the given conditions?
The theoretical yield in grams for this reaction under the given conditions is 11.05g.
What is theoretical yield?The theoretical yield is the greatest amount of a product that can be produced in a chemical reaction. It can be determined using the chemical equation with balance. the relative formula mass, mass, and mass of the limiting reactant, as well as the relative formula mass of the result
Given,
Mass of H₂ = 1.96 g
Mass of N₂ = 9.78 g
Molar mass of H₂ = 2 g/mol
Molar mass of N₂ = 28 g/mol
Lets calculate the moles of N₂ and H₂,
Moles of H₂ = [tex]\frac{given mass}{molar mass}[/tex]
H₂ = [tex]\frac{1.96}{2}[/tex]
H₂ = 0.98 mol
same for moles of N₂ = [tex]\frac{given mass}{molar mass}[/tex]
N₂ = [tex]\frac{9.78}{28}[/tex]
N₂ = 0.349 mol
Now, calculate limiting and excess reagent.
The balanced chemical equation is:
3H₂ + N₂ = 2NH₃
From the balanced reaction we conclude that.
As, 3 mole of H₂ react 1 mole of N₂
So, 0.98 moles of H₂ react with 0.98/3 = 0.32 moles of N₂
From this we conclude that, N₂ is an excess reagent because the given moles are greater than the required moles and H₂ is a limiting reagent and it limits the formation of product.
Let us calculate the moles of NH₃
From the reaction, we conclude that
As, 3 mole of H₂ react to give 2 mole of NH₃
So, 0.98 mole of H₂ react to give [tex]\frac{2}{3}[/tex]×0.98 = 0.65 mole of NH₃
Now we have to calculate the mass of NH₃
Mass of NH₃ = Moles of NH₃ × Moles of NH₃
Molar mass of NH₃ = 17 g/m
Mass of NH₃ = 0.65 × 17
Mass of NH₃ = 11.05g
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Help!!
Predict the missing component in the nuclear equation.
The missing component in the nuclear equation is [tex]{{0} \atop {-1}} \right.[/tex]e.
Nuclear reactions are processes in which one or more nuclides are produced from the collisions between two atomic nuclei or one atomic nucleus and a subatomic particle. The nuclides produced from nuclear reactions are different from the reacting nuclei (commonly referred to as the parent nuclei).
In the given reaction in order to balance the reaction we can see that their mass numbers are same so the difference between them is = 0, and the difference in their atomic number is 91-90 = 1, hence the component is the [tex]\beta[/tex] particle that is formed.
This type of nuclear reaction is know as [tex]\beta[/tex]decay nuclear reactions
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g the conversion of carbon dioxide to carbonic acid can be catalyzed by carbonic anhydrase with an activation energy of 85.6 kj mol-1 at 25c. by what factor will the rate constant increase if the temperature is raised to 37 c?
The rate constant increase by the factor of 4 when temperature is increased from 25C to 37C and activation energy is 85.6KJ. This can be solved using Arrhenius equation.
What is Arrhenius equation?
Arrhenius equation explains the relation between temperature and rate of the reaction for many chemical and physical reactions. It is given by,
k = A x e^(-Ea/RT)
where k = rate of the reaction, Ea = activation energy, R = gas constant, T = temperature.
The increase in the rate of the reaction can be calculated by Arrhenius reaction when the 2 different temperatures are given.
log k2/k1 = Ea / 2.303R [T2-T1 / T2T1] = 85.6 / 2.303 x 8.314 [ 310 - 298 / 310 x 298] = 4.
Therefore, by using Arrhenius equation, the increase in the rate of the reaction when the temperature increased from 25C to 37C is by a factor of 4.
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Draw a diagram to show the arrangement of particles in a solid, a liquid and a gas. What can be interpreted from the distance between the constituent particles.
solid(particles are appropriately packed) in solids there is no distance between the constituent particles
liquid(particles are closely packed).
gas(particles move freely) .
What kind of particle configurations can you find in solid, liquid, and gas?In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. solids are regularly arranged and closely packed.
We can infer from the diagram that there is no space between the individual particles that make up solids. Without any intermolecular voids between the individual molecules, it is a completely packed structure.
In contrast, the particles in liquids are more closely packed than those in gaseous fluids, albeit they are more loosely packed than those in solids. We can now observe that there is a significant intermolecular gap between the constituent particles of gases. They are packed more flimsily than
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The mystery element is in group 2 period 6. It has an atomic weight of
137.33. What element is this, and how many protons and electrons and neutrons does it have
The element that is present in group 2 and period 6 of the periodic table is Barium. The number of electrons here is 56, proton is 56 and neutron is 81.
Periodic table is systematic arrangement of the all the known elements, where the elements are arranged in the order of their atomic number. This table helps the for quick understanding of individual properties such as as their mass, electron number, electron configuration and their unique chemical properties.
The columns of the periodic table are called the groups. There are 18 groups in total. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type.
The horizontal rows are called periods. Periods represents to the relationship of orbitals, or likely areas in which electrons will be found, inside the outermost shell of the atom. As we go down the period the more of electron cloud around the nucleus increases. There are total 7 periods in the periodic table.
If we read the periodic table then we will understand that the element which is present in group 2 and period 6 with atomic weight 137.33 is Barium. As the atomic number of Barium is Z=56 so Np=Ne=56. remaining is 81 which is the number of neutrons.
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it turns out that ozone, o3 , has a small dipole moment. how is this possible, given that all the atoms are the same?
Ozone has dipole moment even though all the atoms are the same because of the presence of lone pair on the central oxygen atom.
The dipole moment of any molecules is the product of the charge on the either side of the molecule and the distance between them.
As we know, Ozone contains 3 oxygen atoms.
The presence of lone pair on the central oxygen atom bends down the molecule of ozone which indeed give result to the a bent symmetry of ozone molecule. As we know, if a molecule is bent then it is very lightly to have some dipole moment.
Even though there are all the items of same kind but the charge on all the three atoms is different which gives contribution in the formation of the dipole moment. So, we can conclude here that the small dipole moment in ozone molecule is observed because of the presence of the lone pair and symmetry of the molecule.
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Chemical compound responsible for ocean acidification in the open oceans of the world.
Answer:
The chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide
The chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide.
What is ocean acidification?Ocean acidification is the global decrease in seawater pH caused by the oceans' extensive uptake of atmospheric carbon dioxide (CO2) in the atmosphere. Ocean acidification is primarily caused by the Earth's atmosphere being overburdened with massive amounts of CO2, which is created by automobiles, industrial processes, and agricultural activities.
A third to a half of the CO2 produced into the atmosphere by human activity since the start of the Industrial Revolution, or around 1750, is being absorbed by the oceans. Scientists believe that at that time, seawater's average pH decreased between 8.19 to 8.05, representing a 30% increase in acidity. The chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide.
Therefore, the chemical compound responsible for ocean acidification in the open oceans of the world is carbon(II) oxide.
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How to do this??
Ty for your help if you help!
Answer:
each element gains one proton as you move from left to right across a period, atomic number is the number of protons
careful not to confuse it with the mass number which is the number of protons and neutrons.
also remember that in any given element, the proton number is always equal to electron number as they have opposite charges that cancel off, this is why elements are neutral.