Explanation:
through the process of electrolysis.
electricity (loose electrons under "pressure") is sent through water allowing the oxygen atoms to bind enough electrons to become independent O2 molecules and detach from water molecules, hence "freeing" themselves as oxygen gas. which in turn also creates free H2 molecules and therefore hydrogen gas.
the free oxygen collects at the positive electrode, the free hydrogen at the negative electrode.
an additional option is to collect the free oxygen that is simply mixed into the water and allows fish to "breathe" (the gills do NOT break oxygen out of the H2O molecules but use the mixed-in free O2 oxygen between the H2O molecules).
that is the reason why a fish tank needs the constant air stream bubbling through the water (or we would have to constantly stir the water in the tank rigorously), and why truly still water bodies "die" (any originally mixed-in oxygen leaves over time, literally suffocating any oxygen-needing lifeforms in those bodies of water).
to capture this, cool the water down to about 4° C (about 39° F), at which point water has its greatest density (below that water expands again preparing for the larger volume needed by the crystalline grid of water ice). that pushes/squeezes a lot of the mixed-in elements incl. free oxygen out of the water.
but that is very little compared to an electrolysis result.
if you close a pressure cooker with the contents at 280k and 1 atm, what is the pressure when the contents are heated up to 406k ?
The new pressure will be 1.45atm.
Ideal gas equation gave a relation between pressure, temperature and volume. It can be expressed as:
PV=nRT
Where, P is pressure, V is volume and T is temperature
The given data:
[tex]T_{1}[/tex] = 280K
[tex]T_{2}[/tex]= 406K
[tex]P_{1}[/tex] = 1 atm
[tex]P_{2}[/tex] = ?
The amount of unknown pressure can be determined by using the formula:
P1/T1=P2/T2....(i)
Now, put the values of given data in above equation.
P2= P1T2/T1
P2=1×406K / 280
P2 = 1.45atm
Therefore, the new pressure will be 1.45atm
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Joey is thinking about applying an equal push force to two objects, one with a small mass, and one with a large mass. What is the most likely outcome to this test?
The smaller object will have a greater change in motion.
The larger object will have a greater change in motion.
Both objects will have an equal change in motion.
Neither object will have a change in motion.
The result of the test is that the smaller object will have a greater change in motion. Option A
What is force?In the simplest sense of the word, a force could be regarded as a push or a pull. We can see that the object irrespective of the mass of the object would continue to be at rest until it is acted upon by a force.
In this question, we are told that Joey is thinking about applying an equal push force to two objects, one with a small mass, and one with a large mass. The force that could move the small mass may not move the large mass due to inertia.
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what is the concentration of h3po4 that is needed to neutralize 17.61 ml of 2.869 m naoh when 31.16 ml of h3po4 is used?
The concentration of H₃PO₄ that is needed to neutralize 17.61 ml of 2.869 m NaOH when 31.16 ml of H₃PO₄ is used is 0.540 M.
The balanced equation is given as :
H₃PO₄ + 3NaOH ------> Na₃PO₄ + 3H₂O
number of moles of NaOH = 0.0176 × 2.869
= 0.050 mol
moles of moles of H₃PO₄ needed = 0.050 / 3 =0.0168 mol
molarity of H₃PO₄ = moles / volume in L
= 0.0168 / 0.0311
= 0.540 M
Thus, The concentration of H₃PO₄ that is needed to neutralize 17.61 ml of 2.869 m NaOH when 31.16 ml of H₃PO₄ is used is 0.540 M.
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what is the anion of cobalt III sulfide
chemical formula:
Co2S3
The only ion that is seen to be a negative ion in cobalt III sulfide is the sulfide ion.
What is an anion?The term anion just means a negative ion. We know that when we have an ionic compound, the ionic compound would have a positive ion which would have a plus sign and a negative ion which would have a minus sign.
We have to look at the compound that is called cobalt sulfide. there are two ions here, the cobalt III ion and the sulfide ion. The cobalt III ion is positive while the sulfide ion is negative.
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What is the outer part (B) of an atom called?
Answer:
B is the outer part atom .
The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). The atoms have different properties based on the arrangement and number of their basic particles.SO the hydrogen atom (H) contains only one proton, one electron, and no neutrons
Explanation:
Would you expect the equivalence point ph of the wasb to be slightly acidic, neutral, or slightly basic? how does this compare to the sasb equivalence point ph?.
The equivalence point of the WASB would be slightly acidic, while the equivalence point of the SASB would be slightly basic. This is because the WASB has a higher concentration of hydronium ions than the SASB.
The hydronium ion is a key player in acid-base reactions. It is the hydrogen ion that is donated or accepted in an acid-base reaction. The higher the concentration of hydronium ions, the more acidic the solution.
In an acid-base reaction, the acid donates a hydrogen ion to the base. The base accepts the hydrogen ion. This creates a new molecule of water. The equivalence point is the point at which the acid and base have reacted in a 1:1 ratio. At this point, the solution is neutral.
If the acid has a higher concentration of hydronium ions than the base, then the equivalence point will be slightly acidic. This is because there will be more hydronium ions present than there were at the start of the reaction.If the base has a higher concentration of hydronium ions than the acid, then the equivalence point will be slightly basic.
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270g of glucose no.of molecules
Next question: 40g of ammonium nitrate
Question 1. There are [tex]9.025*10^{23}[/tex] molecules in 270g of glucose.
Question 2. There are [tex]3.009*10^{23}[/tex] molecules in 40g of glucose.
Explanation:Question 1. 270g of glucose, no. of molecules.1. Find the chemical formula of glucose.Formula: [tex]C_{6} H_{12} O_{6}[/tex]
2. Find the molar mass of this compound.Using the molar mass of each element, which can be found in the periodic table, we make the following calculations:
Molar mass of C: 12.011 u
Total mass of C in compound: (12.011 * 6)= 72.066
Molar mass of H: 1.008 u
Total mass of H in compound: (1.008 * 12)= 12.096
Molar mass of O: 15.999 u
Total mass of O in compound: (15.999 * 6)= 95.994
Why did we multiply the molar mass of C, H and O by 6, 12, and 6? This is because the formula contains 6, 12, and 6 atoms of each element, respectively.
Add up all masses:
72.066 + 12.096 + 95.994= 180.156 g/mole
This result means that 1 mole of glucose has a mass of 180.156 grams.
3. Calculate the number of molecules.Furthermore, 1 mole of any compound has a total of [tex]6.022*10^{23}[/tex] molecules. To find the amount of molecules, find the amount of moles and then the amount of molecules. Do it in the following fashion:
180.156g -----> 1 mole
270g -----------> x
[tex]\frac{270*1}{180.156} =1.499[/tex]
270 grams of glucose is the equivalent of 1.499 moles of said compound.
Now, find the number of molecules using the amount of moles calculated previously.
180.156g ----> [tex]6.022*10^{23}[/tex]
270g ---------> x
[tex]\frac{(270*6.022*10^{23} )}{180.156} =9.025*10^{23}[/tex]
4. Conclusion.There are [tex]9.025*10^{23}[/tex] molecules in 270g of glucose.
Question 2. 40g of ammonium nitrate, no. of molecules.Repeat the same process explained previously:[tex]NH_{4} NO_{3}[/tex]
N: 14.007 u
N: 14.007 u
O: (15.999 * 3)= 47.997 u
14.007 + 4.032 + 14.007 + 47.997= 80.043 g/mole
80.043g ----> [tex]6.022*10^{23}[/tex]
40g -----------> x
[tex]x=\frac{(40*6.022*10^{23}) }{80.043} =3.009*10^{23}[/tex]
There are [tex]3.009*10^{23}[/tex] molecules in 40g of glucose.
2. Which type of intermolecular force accounts for each of
these differences?
a) CH3OH boils at 65°C whereas CH₂SH boils at 6°C.
b) Xe is a liquid at atmospheric pressure and 120 K whereas Ar is a gas under the same conditions.
c)Kr, atomic mass is about 84 amu, boils at 120.9 K, whereas Cl₂, molecular mass about 71 amu, boils at
238 K.
At atmospheric pressure and 120 K, Xe is a liquid, whereas Ar is a gas at the same circumstances.
The right response is B.
What distinct intermolecular forces are there between each other?Intermolecular forces can be divided into three categories: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Despite the fact that molecules can have any combination of these three types of intermolecular forces, all substances at least contain LDF.
What are the four distinct intermolecular force types?These are the four principal intermolecular forces: Van der Waals dipole-dipole interactions > Ionic bonds > Hydrogen bonds > forces of Van der Waals dispersion.
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Why does the graph of beta decay have horizontal change while alpha decay graphs change vertical and horizontal?
In alpha decay both the atomic number and mass number of the atom changes. Whereas, for beta decay only atomic number changes. The horizontal change is representing the change in atomic number and vertical change is for mass number.
What is radioactive decay?Radioactive decay is the process of nuclear decay of an unstable radioactive atom by the emission of charged particles such as alpha, beta or gamma to form a stable isotope.
The nuclear decay by the emission alpha particle is called alpha decay in which the mass number decreases by 4 units and atomic number changes by 2 units. Hence the graph of alpha decay shows both vertical and horizontal change.
In beta decay beta particles are emitted where, no change occurs in mass number but atomic number increases by one. Hence, the graph will only shows the horizontal change.
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How is a covalent structure formed
if a phosphoric acid solution has a ph of 2.42, what can you tell about the relative concentrations of phosphoric acid and dihydrogen phosphate? the pka for each step in the dissociation of phosphoric acid is given.
2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]
The first dissociation of phosphoric acid involves the species phosphoric acid, H2 PO4, and dihydrogen phosphate, H2 PO. The formula for the acid dissociation constant is: Ka, =2.42
the logarithm of the log On both sides of the mentioned equation, ka1 =
Pн = PKA + log [H, PO4)
Using definitions
[H3PO4] The renderson equation mentioned above will be utilized to determine the relative concentrations. log PH - Pka, 2.42; [H2 PO] =0.3
I log x = 2 = 109
Thus, X= 2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]
Dihydrogen phosphate is present at higher concentrations than phosphoric acid.
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Which selection best describes what granger believes to be the major difference between man and the phoenix?.
The statement best describes what Granger believes to be the major difference between man and the phoenix: that the phoenix recognizes when they have made a mistake and eventually will learn not to repeat it. Meanwhile, although a man recognizes his fault, he will continue to repeat them.
What does Granger say about the men and phoenix comparison?
Phoenix is a mythological creature that would burn itself to death only to be reborn from the ashes. As well as humans, we tend to cyclically destroy ourselves and our societies only to build them up again. Granger hopes that eventually, men will learn the lessons from history and stop destroying society.
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what is the concentration in molarity of lithium hydroxide prepared by dissolving 48.0 grams 48.0 grams of solid in sufficient water to make 250 ml 250 ml of solution?
the concentration of lithium hydroxide in molarity was 8M
what are the properties of lithium hydroxide?
A transparent to water-white liquid with a possible strong odour is what lithium hydroxide solution looks like. Skin, eyes, and mucous membranes may have very irritating contact reactions. Through consumption, inhalation, or skin absorption, it may be harmful. Other compounds are created using it.
Given,
weight =48 g
No. of moles =2448=2 moles
volume =250mL
Molarity Volume (in L)No. of moles=0.25L2=8M
=8M
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(100 POINTS) Compare the forces between particles solids, liquids, gases
While solids have certain shape and volume, liquids only have definite volume but not shape, gases neither have shape nor volume. The level of energy is highest in gases, medium in liquid and lowest in solids. The compression of solids is difficult, liquids are nearly incompressible, but gases can be easily compressed.
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in the lichen experiment, the metal cations bound to the the lichen disk surface, and the methylene blue dye was leached into the solution question 7 options: true false
False; after coming into contact with metal cations, methylene blue solution leaches out of the lichens. Because they can accept electrons, metal cations are very electronegative.
Methylene, often known as carbene, is an organic molecule having the chemical formula CH 2 that is also formally known as methylidene and hydrocarbon (also written [CH 2]). It is a colourless gas that only persists in diluted form or as an adduct, fluorescing in the mid-infrared range. The most fundamental carbene is methylene.
A lichen is a symbiotic association between many organisms, such as a cyanobacterium or an algae. In addition to being unique from algae, cyanobacteria are also known as blue-green lichen.
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suppose you need 100 ml of a 0.00046 m solution for an experiment. you are given 10 ml of a 4.6 m stock solution. what is the best method to get the final volume and concentration you need?
Dilute solution is the best method to get the final volume and concentration as we need.
Dilution is "the process of reducing the concentration of a solute in a solution by simply adding more solvent to the solution, eg. water." To dilute a solution, add solvent without adding solute. Adding water to a concentrated solution to achieve the required concentration is a common way to create a solution of a specific concentration. Dilution is the technical term for this process. Dilution can also be achieved by mixing high and low concentration solutions. Stock solutions are often purchased and stored at high concentrations, requiring dilution of the solution as a laboratory procedure. Solutions must be accurately diluted to known low concentrations prior to laboratory use.
Dilution Formula
Dilution is the process of adding solvent to a solution to reduce the concentration of solutes.
molarity = moles of solute / liters of solution
moles of solute = (molarity)(liters of solution)
moles of solute = MV
The initial and final conditions are expressed numerically,
M₁V₁= M₂V₂
In form of concentration equation will write as C₁V₁= C₂V₂
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what are the products for the balanced reaction of hydrochloric acid (hcl) and magnesium hydroxide (mg(oh)2)
The products for the balanced reaction of hydrochloric acid (HCL) and magnesium hydroxide (mg(oh)2) are salt (magnesium chloride ) and water.
The balanced equation is:
[tex]Mg(OH) _{2}+2HCl - MgCl_{2}+2H_{2} O[/tex]
What happens when magnesium hydroxide reacts with HCl?
The reaction between magnesium hydroxide and hydrochloric acid is an example of a neutralization reaction. The hydroxide and hydrogen ions will combine to form water. The remaining ions combine to produce the salt of neutralization. The salt is magnesium chloride.Does magnesium hydroxide dissolve in HCl?
Magnesium Hydroxide is soluble in dilute hydrochloric acid.
Thus, products obtained from the reaction are salt and water.
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sodium hydroxide (naoh) is a notably common strong base. it is used in household cleaning, drain clearing, tissue digestion, chemical pulping, and german pretzel production (which thankfully uses food grade sodium hydroxide, which is rare.) a. to prepare a solution for an important reaction, a scientist places 40 g of naoh in 2 l of water. what is the poh of this solution? what is the ph of this solution?
The pOH of this solution is 0.3 and the pH of the solution is 13.3 .
What is pH ?
The pH of a food is a direct function of the free hydrogen ions present in that food. Acids in food release free hydrogen ions. Hydrogen ions give acidic foods their characteristic sour taste. Therefore, pH can be defined as a measure of free acid. More specifically, pH is defined as the negative logarithm of hydrogen ion concentration. The pH range is 0 to 14. The pH of pure water is exactly 7, so pH 7 is neutral. Values less than 7 are acidic. Values above 7 are basic or basic.
Foods are generally classified as “acidic foods” (low pH, pH 4.6 or less) or “weakly acidic foods” (high pH, pH 4.6 or higher). Safe food storage is determined by the pH of the food. Acidic foods such as fruit and pickles can be safely canned in a tin can with a hot water bath. A combination of acid and hot water (212°F) destroys perishable organisms such as mold and yeast. Proper cooking water canning processes are important to prevent the growth of acid-tolerant molds and yeasts that can lead to elevated pH levels. The pH of borderline foods such as figs and tomatoes can easily exceed 4.6, so lemon juice or citric acid should be added before canning with boiling water. Low-acid foods such as vegetables and meat should be processed in a pressure preserver for safety.
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does a change in temperature affect the solubility of nh3? if yes, at which temperature would nh3 be most soluble? does pressure change has effect on the solubility of nh3? if yes, at which pressure would nh3 be most soluble?
Yes as the temperature increases the solubility of NH3 will decrease and as we increase the pressure solubility of NH3 increases.
Solubility is defined as the maximum amount of substance that will dissolve in a given amount of solvent at a given or specified temperature. Based on solubility different types of solutions can be obtained. A saturated solution is a solution where a saturated solution is a solution where a given amount of solute is completely soluble in the solution.
Whereas a supersaturated solution are those where solute starts precipitating out after a certain concentration.
Temperature does effect the solubility of NH3 because as the temperature increases the hydrogen bonding also decreases, due to which the NH3 molecules are no longer able to bind to water molecules hence their solubility decreases.
But as we increase the pressure on NH3 molecules the bonding with the water molecules will be higher and therefore the solubility also increases.
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The direct current of 100 milliampere flows for four hours through three cells connected in series. They contain solutions of sodium chloride, copper(ii)tetraoxosulphate(vi) and gold (ii)trioxonitrate(v).Calculate the mass of metal deposited in it cell (Na=23.0,Cu=63.5,Ag=197g/mol,F=96500)
The masses of the solutions are; 0.34 g, 0.95 g and 2.9 g respectively.
What is the mass of the metal that is deposited in each cell?We know that in the process of electrolysis, it is possible that we can be able to deposit a given mass of the metal when we pass a direct current through the solution.
We then have;
Quantity of current passed through each solution = 100 * 10^-3 A * 4 * 60 * 60 = 1440 C
Solution 1;
23 g of sodium is deposited by 96500 C
x is deposited by 1440 C
x = 0.34 g
Solution 2
63.5 g is deposited by 96500 C
x is deposited by 1440 C
x = 0.95 g
Solution 3;
197 g is deposited by 96500
x is deposited by 1440 C
x = 2.9 g
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Which of the following phrases describes the similarities between problem space theory and how the brain looks at problems
The phrases that describes the similarities between problem space theory and how the brain looks at problems is option C: They can occur quickly or slowly.
What does problem space theory entail?The category of problem-solving techniques used in social science includes the problem space theory. The problem space theory employs the strategy of characterizing the issue before seeking a resolution. The focus of a problem space is on the stages and objectives involved in solving a problem rather than providing details of a solution.
Note that Your heart rate increases as your brain releases a surge of adrenaline, causing you to become stiff and shake. Despite the absence of difficulties, the brain is programmed to find solutions. The brain invents a new problem to remedy when there is nothing to tackle.
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See full question below
Which of the following phrases describes the similarities between problem space theory and how the brain looks at problems?
They have only three steps.
They can only be used in a laboratory setting.
They can occur quickly or slowly.
They are biased against the scientific method.
what would be the formula of the solid (precipitate) product that forms when fe2(co3)3 (aq) and mgbr2 (aq) are mixed? (break the compounds into their individual ions before combining to get the products) (all the numbers in the possible answers are subscripts)
Iron bromide will form principate during the reaction.
When cations as well as anions in an aqueous solution combine to generate a precipitate, an insoluble solid, precipitation processes take place.
When target ion concentrations were identical, the ion that forms the poorest soluble compound would precipitate initially (at the lowest counter ion concentration), followed by the other ions as when the solubilities of respective compounds are attained.
When fe2(co3)3 reacts with mgbr2 then it will form iron bromide and magnesium carbonate.
Its chemical reaction can be written as:
[tex]Fe_{2}CO_{3} +MgBr_{2}[/tex] →[tex]FeBr_{3} +MgCO_{3}[/tex]
Here, magnesium carbonate will form ppt because it it will be a insoluble.
That's why it can be said that it will form ppt during the reaction.
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What is the solubility of strontium iodate, Sr(IO3)2, in water? The Ksp for Sr(IO3)2 is 1.14x 10-7.Sr(IO3)2(s) Sr2+(aq) + 2IO3- (aq)
The solubility of the strontium iodate is 3.1 * 10^-3 M.
What is solubility?The term solubility has to do with the amount of a solid that is dissolved in water. We know that there are some substances that are able to dissolve better in water than others.
We now have to find the solubility of the strontium iodate from the following;
Ksp = [x] [2x]^2
Ksp = 4x^3
The solubility of the substance is x.
x= ∛Ksp/4
x =∛ 1.14 x 10^-7/4
x = 3.1 * 10^-3 M
The solubility of the solid is obtained as 3.1 * 10^-3 M.
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Which type of fire can help prevent larger fires in the
future?
ACrown
B Surface
C Ground
Future greater fires can be avoided by putting out ground fires, which are those that burn beneath the surface.
The correct answer is C
Describe ground fire.A ground fire is a particular kind of wildfire that starts underground when fuels like peat, coal, tree roots, or other buried organic debris catch fire and burn. Ground fires may end up burning through the ground's surface and turn into surface fires, depending on the circumstances of the fire.
Why do ground fires start?Plant roots as well as other organic material ignited beneath the soil surface cause ground fires. Surface fires, which burn old or dried vegetation that is laying or growing slightly above the ground, might develop from these fires. On the contrary hand, crown fires consume the tree canopy.
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a 25.00 ml sample of koh is titrated with 21.83 ml of 0.2120 m hcl(aq). what is the concentration of the koh solution?
The molarity or the molar concentration of the KOH solution is 0.18M.
The equation of reaction for KOH and HCl is,
KOH + HCl → KCl + H₂O
As we can see,
Moles of KOH = Moles of HCl.
We also know,
Moles = molarity x volume.
Molarity of KOH x Volume of KOH = Molarity of HCl x Volume of HCl
Volume of KOH is 25 ml.
Molarity of HCl is 0.212M.
Volume of HCl is 21.83 ml.
Putting values,
Molarity of KOH x 25 = 0.2120 x 21.83
Molarity of KOH = 0.18M.
The concentration of KOH solution is 0.18M/.
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what is the rate constant for the reaction? express your answer in liters per mole per minute to two significant figures.
The rate constant for the reaction is the relation between the concentration of the reactant and the chemical rate of reaction.
The rate constant of the chemical reaction is the proportionality constant that describes the relationship between the concentration of the reactants and the chemical rate of reaction. The symbol of rate constant is k. Rate is depends on the temperature. unit for the zero order reaction is : L⁻¹ s⁻¹. unit of rate constant for the first order reaction is : s⁻¹. unit for the rate constant for second order reaction is : mol⁻¹ L s⁻¹.
Thus, The rate constant for the reaction is the relation between the concentration of the reaction and the chemical rate of reaction.
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What are both names for the compound HNO₂?
(In the spaces provided, write out the complete names of the compound requested)
The name of this compound when not dissolved is type your answer...
The name of this compound when dissolved in type your answer…
Answer:
Explanation:nitrous acid
2. if an ir spectrum is recorded for 2 samples using the same sampling method, and the resulting ir spectra are identical, can we say that the two samples are identical (meaning that they are the same chemical compound)? explain your answer. 3. how could you use ir spectroscopy to distinguish between a carboxylic acid and a ketone? 4. how could you use ir spectroscopy to distinguish between an aldehyde and a ketone?
No, we cannot say that if the IR spectrum is recorded for 2 samples using the same sampling method then the resulting IR spectra are not identical.
Because, in general, it means they have the same functional groups but do not that they have the same chemical compound, different molecules have the same functional groups and stereochemistry is not taken into consideration so these compounds can be enantiomers.
The distinction between a carboxylic acid and a ketone using the IR spectroscopy method is that both compounds have C=O but the ketone does not have OH stretch and distinguish between an aldehyde and a ketone using spectroscopy method that compounds have C=O stretch but aldehyde should have C-H stretches between the carbonyl carbon and the aldehydic Hydrogen.
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suppose that an atom has (i) 4, (ii) 5, electrons in different orbitals. what are the possible values of the total spin quantum number s? what is the multiplicity in each case?
The spin quantum number will be 2 and 2.5 and multiplicity in each case will be 5 and 6.
The angular momentum of such an electron is described by its spin quantum number (ms). An electron carries orbital angular momentum in addition to angular momentum around its axis of rotation. The Spin Quantum Number (s) really does have a magnitude (1/2) and a direction (+ or -) since angular momentum would be a vector.
(i) If an atom has 4 electrons then it will have total
Total spin quantum number = 1/2+1/2+1/2+1/2 = 4/2=2
Multiplicity = 2S+1= 2×2+1=5
(ii) If an atom has 5 electrons then it will have
Total spin quantum number = 1/2+1/2+1/2+1/2+1/2 = 5/2 = 2.5
Multiplicity = 2S+1= 2×2.5+1=6
Therefore, the spin quantum number will be 2 and 2.5
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Which missing item would complete this alpha decay reaction?
The missing item which would complete this alpha decay reaction is: C. ²⁵³Fm₉₈.
The types of radioactive decay.In Science, there are three (3) main types of radioactive decay and these include the following:
Beta decayGamma decayAlpha decayWhat is an alpha decay?An alpha decay can be defined as a type of radioactive decay in which the atomic nucleus of a radioactive element emits an alpha particle, thereby, producing chemical elements that have different atomic nucleus.
During an alpha decay, a radioactive element such as fermium (Fe) with a mass number of 257 would be decreased by four (4) while its atomic number (number of protons) of 100 is decreased by two (2), to produce an isotope and an atom of Helium (⁴He₂), as illustrated in the chemical reaction below:
²⁵⁷Fe₁₀₀ ----> ²⁵³Fm₉₈ + ⁴He₂
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