the difference in the atomic radii of fluorine and lithium is most similar to the difference in the atomic radii of which pair of elements?
As one proceeds through the periodic table from left to right, the atom of each element gets smaller. Lithium's higher atomic radius than that of fluorine is most comparable.
What is meant by atomic radii?Atomic radius, also known as atomic radius, is the total length between an atom's nucleus and its electron's outer orbital. The average or normal distance between the nucleus's center and the edge of the surrounding electron shells is what we refer to as an element's ionic radii.
Why do atomic radii occur?This is due to the fact that there are higher energy levels, resulting in a wider gap between electrons and protons. The attraction between the remaining electrons and the positive charges nucleus is also reduced as a result of electron shielding, allowing them to move further away from it. As a result, the size and atomic radius grows.
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without tasting, smelling, or removing either layer from the container, how can you clearly determine which layer is the aqueous layer using just material found in a typical kitchen?
Add distilled water towards the funnel to quickly identify which layer is aqueous layer .
By adding distilled water in aqueous solution, the organic layer will be the one that decreases in size, while the aqueous layer must expand. The two layers could then be divided into their corresponding beakers.
Water inside the liquid state serves as the solvent in such an aqueous solution. In other words, water molecules surround and integrate solute (dissolved) ions as well as molecules into their web of bonds.
If it is challenging to determine in which the droplets travel, also keep note of the layers' volumes: the watery layer indicates whichever layer expands as more water is added.
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The solubility of copper(II) iodate in water is 0.13 g/ 100 mL. Calculate the solubility product constant for copper(II) iodate, Cu(IO3)2? Cu(IO3)2(s) Cu2+(aq) + 2IO3 - (aq
The solubility product of the copper(II) iodate is 1.25 * 10^-7
What is solubility?The term solubility has to do with the amount of a substance that is dissolved in water. The solubility product is the equilibrium constant that shows the extent to which a substance is dissolved in water.
We have to convert the solubility of the copper(II) iodate from g/mL to molarity and we have;
Number of moles = 0.13 g/413 g/mol = 3.15 * 10^-4 moles
Volume of the solution = 100 mL or 0.1 L
Molarity = 3.15 * 10^-4 moles/0.1 L
= 3.15 * 10^-3 M
We now have;
Ksp = [x] [2x]^2
Ksp = 4x^3
Ksp = 4( 3.15 * 10^-3 )^3
Ksp = 1.25 * 10^-7
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Calculate the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of caf2 in 850.0 g of water.
the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of caf2 in 850.0 g of water. is 0.00840 moles
The calculation of the mole fraction is as follow:
As we know that
Molar mass = Number of grams ÷ number of moles
Or
number of moles = Number of grams ÷ molar mass
from the question
Number of moles of CaI2 = 0.400
And, Molar mass of water = 18.0 g/mol
Now we can calculate the moles of water is
= 850.0 g ÷ 18.0 g/mol
= 47.22 mol
And, Total number of moles is
= 0.400 + 47.22
= 47.62
So, Mole fraction of CaI2 is
= 0.400 ÷ 47.62
= 0.00840 mole
hence, the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of caf2 in 850.0 g of water. is 0.00840 moles
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what element uses the following quantum numbers:
n=2 l=1 ml=-1 ms=1/2
n=3, l=2 ml=-1, ms=-1/2
The elements that has the quantum numbers shown are;
n=2 l=1 ml=-1 ms=1/2 - Boronn=3, l=2 ml=-1, ms=-1/2 - ScandiumWhat is the quantum number?The quantum number is used to be able to identify the electron in an atom. We know that the orbital is a region in space where electrons could be fond and electrons are identified in the orbitals where they are found by the use of quantum numbers.
Now we have to use the quantum numbers as shown to be able to identify the elements that have them. This is so because the kind of element can be known from the quantum numbers that its electrons posses.
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write the net ionic equation for the reaction between agno3aq and na2so4aq. be sure to include states of matter in your answer.
The net ionic equation for the reaction between agno3aq and na2so4aq would be 2Ag+(aq) + SO4^2-(aq) → Ag2SO4(s)
The net ionic equation shows the chemical species involve in the chemical reaction while the complete ionic equation also involves the spectator ions. The net ionic equation state whether precipitation occurs or not. If the chemical reaction has no net ionic equation it means all are aqueous from no precipitation occurring.
AgNO3 → Ag+ + NO3-
Na2SO4 → 2Na+ + SO4^2-
2AgNO3(aq) + Na2SO4(aq) → 2Ag+(aq) + 2NO3-(aq) + 2Na+(aq) +SO4^2-(aq)
2Ag+(aq) + 2NO3-(aq) + 2Na+(aq) +SO4^2-(aq) → Ag2SO4(s) + 2NaNO3(aq)
2AgNO3(aq) + Na2SO4(aq) → Ag2SO4(s) + 2NaNO3(aq)
We cancel the spectator ions (NO3^- and Na^+)
the net ionic equation with states of matter is:
2Ag+(aq) + SO4^2-(aq) → Ag2SO4(s)
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which two of the following electronic configurations (in quantum mechanical notation) are not reasonable? indicate the letters of the two unreasonable electronic configurations: . a) 1s22s22p4 b) 1s22s22p73s23p4 c) 1s22s22p63s23p5 d) 1s22s62p5
1s²2s²2p⁷3s²3p⁴ two of the following electronic configurations (in quantum mechanical notation) are not reasonable.
The correct option is B.
How do you find the electron configuration?Using subshell labels, the electronic structure of an atom is described. These labels include the subshell name, which is determined by the azimuth and elevation quantum number, the shell number, which is determined by the main quantum number, and the total quantity of electrons in the subshell, which is indicated in superscript.
What three factors influence electronic configuration?An atom's electron configuration describes how its electrons are dispersed across its orbits (shells) and subshells. An atom's electron configuration is crucial because it aids in predicting a substance's chemical, physiological, electrical, and magnetic characteristics.
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The box shows the element helium as it appears in the periodic table. He Helium 4.0 Which list gives the correct numbers of subatomic particles for a neutral atom of helium?
A. Two protons, four neutrons, six electrons
B. Two protons, two neutrons, two electrons
C. Two protons, two neutrons, four electrons
D. Four protons, four neutrons, four electrons
The correct numbers of subatomic particles for a neutral atom of helium are C) Two protons, two neutrons, four electrons
What are subatomic particles ?
Any of the multiple self-contained units of matter or energy that are the building blocks of all matter are considered subatomic particles, also known as elementary particles. They include the heavier constituents of the small but extremely dense atom's nucleus, the positively charged protons and the electrically neutral neutrons, as well as the electrons, the negatively charged, nearly massless particles that still make up the majority of the atom's size. The only known subatomic particles, however, are not these fundamental atomic building blocks.
These particles are frequently referred to as subatomic particles since they are the building blocks of atoms. There are protons, neutrons, and electrons, three types of subatomic particles. Protons and electrons, two of the subatomic particles, each have an electrical charge of one or the other.
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todd is attempting to finish an extraction begun by his lab partner. at this time, his separatory flask contains water and toluene, with benzylamine, 1,3-diphenylacetone, and phenol dissolved in the toluene layer. to separate out the benzylamine, he should add:
HCl can be added to separate benzylamine from the toluene mixture.
A widely used method of separating two liquids from each other or popularly called liquid-liquid extraction is being implemented here.
The knowledge of pH values helps in treating the contents of the solution that is to be extracted and their subsequent isolation as well Here, the concept of acid-base extraction is applied to understand that the separation of benzylamine which is an organic base can be done by extracting it by adding HCl to the solution. The addition of hydrochloric acid leads to the formation of a corresponding ammonium salt, the amine can be later recovered by adding a base thereby converting the formed compound back to benzylamine.
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a balloon of helium has a volume of 1.0 l at 0.98 atm. the balloon floats in the sky until the pressure is 0.50 atm. what is the new volume assuming temperature is constant?
According to the given statement 1.96 L is the new volume assuming temperature is constant.
What qualifies as an ideal gas?An volume of a gas is just one where there were no intermolecular attraction forces and all collisions involving atoms or molecules are entirely elastic. It can be seen as a group of perfectly spherical particles that collide but do not otherwise interact with one another.
Briefing:Initial pressure (P₁): 0.98 atm
Initial volume (V₁): 1.0 L
Final pressure (P₂): 0.50 atm
Final volume (V₂): ?
Boyle's law provides an expression for this for an ideal gas that experiences an isothermal change.
P₁×V₁ = P₂×V₂
V₂ = P₁×V₁ / P₂
V₂ = 0.98 atm * 1.0 l / 0.50 atm
V₂ = 1.96 L
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Suppose a friend tells you he has a temperature of 38 degrees Celsius. Your temperature is 38 degrees Celsius. Do the particles that make up your body or your friend's body have a greater average kinetic energy? Explain.
The particles that make up your body or your friend's body doesn't have a greater average kinetic energy as they are equal to them having the same temperature.
What is Kinetic energy?This is referred to as the energy possessed by a body by virtue of its motion while temperature is the degree of hotness or coldness of a substance.
We were told that they both have a temperature of 38 degrees Celsius which means that the particles present in both bodies have the same average kinetic energy. We should also note that the higher the temperature, the higher the average kinetic energy and vice versa.
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a 20 ml sample of gastric juice (composed of strong acid) was titrated with 0.0011 m aqueous naoh. the addition of 6.7 ml of naoh resulted in a neutral ph. what was the original ph of the gastric juice sample?
The original pH of the gastric juice sample is 3.43
What is pH ?pH serves as a measure to calculate the acidity/alkalinity of a solution. It's ranges is between 0 - 14, with 7 being neutral. A pH below 7 indicates acidity and a pH above 7 indicates basicity. pH is actually a measure of the relative amounts of free hydrogen and hydroxyl ions in water.
As we know:
M₁V₁ = M₂V₂
For the given question:
M₁ = Concentration of gastric juice
V₁ = Volume of gastric juice (20 ml)
M₂ = Concentration of NaOH (0.0011 M)
V₂ = Volume of NaOH (6.7 ml)
So, M₁ = M₂V₂ / V₁
M₁ = 0.0011 × 6.7/20
M₁ = 0.000365
For pH:
pH = -log [H⁺]
pH = -log [0.000365]
pH = 3.43
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Use the equation below to answer the following question. How many grams of hydrogen are necessary to
react completely with 50.0 g of nitrogen in the reaction of the formation of ammonia?
N₂ + 3H2 → 2NH3
O 10.8 g H₂
O
15.0 g H₂
O
20.1 g H₂
O 41.2 g H₂
DONE
The mass of hydrogen necessary to react with 50.0g of nitrogen in the reaction of ammonia is 10.8g.
What is ammonia?
Ammonia is a colorless gas which when dissolved in water readily gives ammonium hydroxide which causes irritation. It can also be used as cleaning agent also it is a pungent gas composed of hydrogen and nitrogen.
According to the given equation of ammonia formation,
N2 + 3H2 -------> 2NH3
there is 1 mole of nitrogen reacting with 3 moles of hydrogen to give 2 moles of ammonia. In terms of mass, 28.01g of nitrogen needs 3 moles of hydrogen that is 6.048g of hydrogen.
We can say that,
28.01g of N2 requires 6.048g of hydrogen,
1g of N2 requires = 6.048 / 28.01 = 0.048g
50g of N2 requires = 0.048 x 50.0 = 10.8g of H2.
Therefore, 10.8g of H2 is required to react with 50.0 g of N2 to make ammonia.
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Answer:
its a
Explanation:
10.8 g H2
Select TWO questions that the residents of the farming community could ask to evaluate the proposed solutions.
Question 4 options:
Does this plan take into consideration damage to the crops caused by extreme weather events?
Does this plan allow the farms in our community to continue to be profitable?
Will this plan allow our community members to independently select oil suppliers?
Does this plan allow for a significant reduction in the use of diesel fuel?
Will this plan increase our farming community's access to new varieties of seeds?
Among the following, the most probable questions that could ask to the farming community are options 1 and 4. These questions addresses the issue and advantages of a crop field.
What is farming?Farming is way of growing plant or animal varieties cultivating for food and sail. Better planning and designing of farm field gives benefits for farmers.
Farmers should aware of each varieties of their crop and its growth conditions and disadvantages also. Hence the probable questions that could ask to a farming community are does this plan take into consideration damage to the crops caused by extreme weather events
And the fourth option also will this plan increase our farming communities access to new varieties of seeds?
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The carbon cycle is normally self-regulating; it keeps itself constant. The amount of carbon dioxide kept in the oceans, locked in rocks and in the air is
ANSWER
over time.
Rose petals contain a variety of different coloured pigments. A student wants to identify these pigments. Explain why
The petal of rose has different kinds of pigments like anthocyanins, carotenoids which give them the colors.
What are Anthocyanins?
Anthocyanins are the pigment that produces red color in the roses. They belong to Flavonoids family.
The pigments in a rose's petals give it its color. These pigments mostly consist of carotenoids and anthocyanins. Bright yellow, orange, and red pigments like those in lemons, oranges, and tomatoes are made by carotenoids. They are contained in structures called plastids, which are a component of the cytoplasm of plant cells. They are therefore steady and largely unaffected by the environment or the health of the plant. Deep red, magenta, purple, and blue colors are made of anthocyanins. They are transported via the sap of the plant and are water soluble. They are far less stable and more susceptible to external variables because they are in a fluid environment.
According to research, a bloom's anthocyanin content and sap pH fluctuate as a flower develops from a bud to a bloom. The pH of the sap increases with bloom aging and anthocyanin content decreases. As those who grow hydrangeas are aware, more acidic conditions prefer the pink/red end of the color spectrum while high alkaline levels produce blue colorations. As a result, as your rose bloom ages and its pH rises, the red will tend to lean toward the darker, bluer side of the spectrum. When a flower is in bloom, anthocyanin levels are still high, but they start to drop off swiftly as the blossom fades.
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which of the following is true about free radicals? a. they are unstable and highly reactive molecules. b. they act as antioxidants in the body. c. they defend against cancer.
It is true about free radicals. a. they are unstable and highly reactive molecules.
Hydrogen peroxide and hydroxyl ions are two examples of oxygen-containing molecules with an unbalanced number of electrons. The unequal distribution of electrons makes it simple for them to interact with other molecules. To combat free radicals, use antioxidants. Heart disease and cancer are caused by free radicals. an unstable molecule type produced by typical cell metabolism The physiological metabolism produces some of these reactive molecule species (RMS), also known as "Hydrogen peroxide and hydroxyl ions are two examples of oxygen-containing molecules with an unbalanced number of electrons. The unequal distribution of electrons makes it simple for them to interact with other molecules. To combat free radicals, use antioxidants. Heart disease and cancer are caused by free radicals. an unstable molecule type produced by typical cell metabolism The physiological metabolism produces some of these reactive molecules species (RMS), also known as "free radicals" or "oxidants." Cell compartments and cells are hurt or destroyed when RMS concentrations go above a certain free radicals" or "oxidants." Cell compartments and cells are hurt or destroyed when RMS concentrations go above a certain point. These reactive molecules species (RMS), also known as "free radicals" or "oxidants," are a by-product of some physiological processes.
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which one is correct?
How do you find the mass number
The mass number is always the number of protons and neutrons together
Ex: 1 protons and 3 neutrons
Mass number: 4
Atomic number (number of protons): 1
Answer:
mass= volume x density
Explanation:
weight is the measure gravitational force acting on a mass
Can yall help me with this
The summary of the paragraph is that if you live on a high latitude there would be greater seasonal variation.
What is the equator?The equator is said to be that imaginary line that does divide the earth into the Northern and the southern Hemispheres. This implies that the equator is the line that divides the earth into to halves and the two haves of the earth are responsible for the variations in many things on earth such as the day and night experience.
We can see from the passage that if you are living in a position that is closer to the equator then it follows that the variation of day and night would have less difference as well as less of seasonal differences.
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while performing the dumas experiment, if the outside of the flask were not completely dry (part i), how would this affect the calculated molar mass of the unknown volatile liquid? would it be higher or lower? explain.
Initially, the Flack is the flask filled with water and weighed to find may of water + flask Afla that the Flask is empty flack in noted. emptied and mars ofMass of water in the beaker. calculated by is mars of the flask from. subtracting from this volume of a mass of water + flask.
Flask is calculated using the standard density of water at that ten pleasure. If the flask is not a day from outside at that time, the mass of water will be More than the actual. This results. the higher calculated volume of the flask. As Molar mass. M- MRT PV mass of volatile where Mina's liquid.
Analysis of total nitrogen in organic matrices can be performed using the Dumas method. This ensures the complete combustion of the matrix under oxygen. The resulting gas is reduced with copper and dried with CO2 trapped. Next, quantify nitrogen using a universal detector. Use a thin glass flask with a long neck.
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If a ball begins rolling up a ramp with 200 J of kinetic energy how much potential energy will it have at the top of the ramp when it stops 
If a ball has 200 J of kinetic energy when it starts rolling up a ramp, it will also have 200 J of potential energy when it stops rolling up the ramp. Energy overall is constant.
What are kinetic energy and potential energy?
The energy that's also stored in any object as well as system as a result of the its position or component arrangement is known as potential energy. The object or system is unaffected by external factors like air pressure or altitude. Kinetic energy, on the other hand, describes the power of moving particles within a system or an object. In contrast to potential energy, which is independent of other fixed and moving objects in its immediate vicinity, kinetic energy is related to those objects. For instance, the object's kinetic energy would be higher if it is placed at a higher height. Potential energy varies with object mass, height, as well as distance and is not transferable. Kinetic energy can be transferred from a moving
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the titration of a polyprotic acid with sufficiently different pka 's displays two equivalence points. why?
If Ka1 and Ka2 are sufficiently distinct and a polyprotic acid is titrated with a strong base, the pH curve will contain two equivalence points because the two acidic protons will be titrated sequentially.
What is titration?Titration is a method of chemical analysis in which the amount of a sample's constituents is determined by adding a precise amount of a different substance—one that the desired constituent reacts with in a specific, known proportion—to the sample being tested.
The titrating reagent, or titrant, is gradually added to the process using a standard solution (i.e., a solution of known concentration), which is administered using a burette, which is essentially a long, graduated measurement tube with a stopcock and a delivery tube at its bottom end. The addition comes to an end at the comparable point.
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In the following reaction:
2 NaClO4 → 2 Na + Cl2 + 4 O2
How many moles of O2 will be produced when 15.6 moles of NaClO4 decompose?
Answer:
31.2 moles of O2
Explanation:
You have to do stoichiometry to convert moles of NaClO4 to moles of O2.
You have 15.6 moles of NaClO4, you need these to cancel out so you use your coefficient from the equation. Since you are trying to find moles of O2 you put your coefficient of oxygen in the numerator. Multiply across the top & divide by the bottom to get 31.2 moles of O2.
[tex]\frac{15.6 mol NaClO4}{1} * \frac{4 mol O2}{2 mol NaClO4}[/tex]
Which element has the ground state electronic configuration, 1s22s22p63s23p64s1 ?.
Potassium is the element that has the ground state electronic configuration, 1s22s22p63s23p64s1.
The electronic configuration describes the distribution of electrons in their atomic orbital. In an electronic Configuration, subshells that contain electrons, and the total number of electrons in each of the subshells are written in a sequence.
It is used to find out the valency of an element, Predict the properties of a group of elements and Interpret atomic spectra.
The subshells are s, p, d, and f and the total number of electrons that they can hold is 2, 6, 10, and 14 respectively.
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write the net ionic equation for the reaction that occurs when 0.087 mol hcl is added to 1.00 l of the buffer solution. use h3o instead of h .
The net ionic equation for the reaction that occurs NO2- + H3O+ = HNO2 + H2O
If HCl is added, then it reacts with the conjugate base of HNO2 means NaNO2.
The ionic equation via breaking all the soluble ionic compounds (the ones marked with an (aq)) into their respective ions. every ion has to be shown with its price and an (aq) to reveal that its miles are present inside the answer. Use coefficients to reveal the variety of every ion present.
A molecular equation is an equation wherein the formulation of the compounds is written as though all materials exist as molecules. An ionic equation is one wherein dissolved ionic compounds are proven as loose ions. Examples of molecular and ionic equations are proven.
Ionic equations and internet ionic equations are usually written most effectively for reactions that arise in answer and strive to show how the ions present are reacting.
If NaOH is added then it must react with the weak acid HNO2.
Thus, the net reaction contains NaNO2.
NaNO2 + HCl = HNO2 + NaCl
The ionic equation will be:
NO2- + H3O+ = HNO2 + H2O
(because it is given to use H3O+ instead of H+)
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What was the initial volume of a gas that had an initial temperature of 20.65 C if it reached a final temperature of 41.77 C and final volume of 16.14 L.
If a gas had an initial temperature od 20.65 C and a final temperature of 41.77 C, its initial volume would be 7.979.
How are volume and example used?The volume of any solid in three dimensions is equal to the area it occupy. These solids include shapes like a cube, cuboid, conical, cylinder, and sphere. The form affects how much volume there is.
What does a gas' volume mean?The space occupied by the gaseous particles under typical pressure and temperature circumstances is referred to as the volume of gas. It has the symbol "V." The symbol for volume in the SI is "liters," or "L". When the gas is at normal temperature, a mole has a volume of 24 m3, or 24 000 cm3. The molar volume of a gas is this quantity.
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if he gas has an average kinetic energy of 6950 j/mol6950 j/mol under certain conditions, what is the root mean square speed of o2 gas molecules under the same conditions
The root mean square speed of O₂ gas molecules under the same conditions is 521.04ms⁻²
Kinetic energy is the energy an object has because of its motion
Here given data is
He gas = 6950 j/mol
We have to find root mean square = ?
So the formula is to find root mean square is
Vrms = √RT/m
Vrms = RMS velocity of the gas
T = absolute temprature of the gas
M = molar mass of the gas
R = universal gas constant
So, average molar kinetic energy of gas
E = 1/2 mv²rms = 1/2 RT
This equation reveal that molar KE is independent of the nature of the gas and it only depends on temprature as ideal behavior is concerned and so both He and O₂ will have same KE = 6950 j/mol and under the same condition of temprature
So for O₂
1/2 m O₂ V²rmsO₂ = 6950 j/mol
Taking atomic mass of O₂ = 16g/mol
V²rmsO₂ = 6950 × 2/2×16g/mol
VrmsO₂ = √69500000/16g/mol
VrmsO₂ = 521.04ms⁻²
Root mean square speed of O₂ gas molecules is 521.04ms⁻²
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Does Cs+ or Ba2+ have a smaller radius
I need answers now.. please