If 89.5 grams of silver is produced, 105.45 grams of Cu reacted.
The Chemical equation is
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
The equation is balanced,
89.5 grams of Silver is produced in the reaction.
It is asked that how much Cu will be produced.
The amount of Copper can be calculated by using mole concept,
From the reaction,
When 1 moles of Copper Reacts, 2 moles of Ag are formed.
So, we can say,
Mole of Cu (n) = 2 x Moles of Ag
Mole of a compound can be found by using the formula,
Moles = Given mass of compound/Molar mass of the compound
So,
n = 2 x 89.5/107.87 moles
n = 2 x 0.82 moles
n = 1.64 moles.
Moles of Copper are 1.64.
So, the mass of Cu reacted will be
1 mole Cu = 63.55 grams
1.64 moles Cu = 1.64 x 63.55 grams
1.64 moles of Cu = 105.45 grams.
To produce 89.5 grams of silver, 105.45 grams of Copper would have reacted.
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the electron configuration for copper is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 1 3 d 10 1s22s22p63s23p64s13d10. how many inner core electrons does copper contain?
Copper [Cu] has 28 inner core electrons
Copper is a group 11 element with atomic number 29. It has one valence electron
Valence electron is the electron in the outermost shell and it's the number of electron an atom lose or gain to become a noble gas
Cu has four electron shells with 2,8,18 and 1 electrons in each shell respectively
The outermost shell containing just one electron .
Apart from this shell, the rest of the shells contain 28 electrons and these are regarded as the inner core electrons
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There are three materials A, B and C. Materials A and C are soft and B is lustrous and hard; but material B is dull and not very hard. Identify the metals and non-metals from A, B and C.
A and C are metals and B is non-metal.
Metal are soft so A and C are metal and B is dull and not very hard so it is non-metal.
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According to the characteristics of metals and non-metals,materials A and C are soft while material B is a non-metal and it is not very hard.
What are the characteristics of metals and non-metals?An element is the simplest form of matter.Elements are further classified as metal,non -metals and metalloids. Metals possess luster and are malleable that is they can be drawn into thin sheets.They are also ductile and can be drawn into thin wires and are hard due to the strong ionic bonding present in them.
Non-metals on the other hand do not possess luster and are dull . They are not malleable and ductile and are soft due to the covalent bonding present in them .Due to the hard structure of metals they have high melting points and non-metals on the other hand owing to their soft nature have low melting points.
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At what frequency can you tune in an FM radio signal if the station's signal has a wavelength of 3.34 m?
89.82 MHz frequency tune in an FM radio signal if the station's signal has a wavelength of 3.34m.
What are frequency and its measure?The number of cycles or periods each second is measured by frequency. The hertz is the Si derived unit for frequency (Hz).
What is the purpose of frequency?The temporal rate of change seen in oscillatory and cyclic events, such as mechanical motion, audio signals (music), radio waves, and light, is specified by the frequency, an essential parameter in science and engineering.
Briefing:The equation is
f = cλ
Where lambda λ is the symbol for wavelength.
Where c = 300 000 000 m/s (3*10⁸ m/s), then:
300000000m/s/3.34m = 89820359.2814s
89.82 MHz.
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what is meant by the term bumping? select one: agitating a liquid with a stir bar or stirring rod one liquid coming in contact with another suddenly increasing the temperature on a liquid sudden and uncontrolled boiling of liquid
Bumping is the sudden and uncontrolled boiling of liquid.
Bumping is a word used in chemistry to describe the situation where homogeneous liquids boiled in a test tube or other container will superheat and, upon nucleation, rapid boiling will expel the liquid from the container. This happens when liquids are heated up beyond their boiling points and it causes them to burst out of their containers.
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A compound of bromine and fluorine is used to make uf6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58. 37 mass percent bromine. Determine its empirical formula.
The empirical formula for the given compound is BrF₃.
It is given that,
% of Br = 58.37
then % of F = 100 - 58.37 = 41.63%
Let the mass of the compound be 100 g. So, the percentages given are taken as mass.
Mass of Br = 58.37 g
Mass of F = 41.63 g
To formulate the empirical formula,
No. of moles of Br = 58.37/79.90 = 0.73 moles
No. of moles of F = 41.63/19 = 2.19 moles.
For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.73 moles.
For Bromine = 0.73/0.73 = 1
For Fluorine = 2.19/0.73 = 3
Now, taking the mole ratio as their subscripts.
The ratio of Br : F = 1 : 3
Hence, the empirical formula for the given compound is BrF₃.
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What type of data would be helpful to collect in the Antacid Film Canister Lab?
All of these choices
The temperature of the reactants
The concentration of the reactants
The time it takes for the top to pop on the film canister
The data that we could be able to collect in the antacid cannister lab is the time it takes for the top to pop on the film canister.
What is the Antacid Film Canister Lab?Just like every other lab that we could carry out in the pure sciences, the Antacid Film Canister Lab has the aim of trying to obtain the pressure that would be require to blow off the rocket.
In this case, the antacid is gradually dissolved in such a way that the carbon dioxide would be produced and the pressure would keep building up inside the cannister somewhat gradually.
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Find the mean of the data.
The number of students who
have a cat in each class.
4, 1, 3, 9, 6, 3, 2, 4
Mean [?] cats
The mean of the data is 4.
The formula of the mean is
Sum of all the observation÷ Total number of observations
So, According to the formula :
Sum of all the observations= 4+1+3+9+6+3+2+4 = 32
The number of observations is 8
So,
32÷8
= 4
Hence, the mean of the data is 4.
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What is the concentration of nitrate ion in a solution made by mixing 100 ml of a 0.200 m hno3 solution with 200 ml of a 0.100 m solution of mg(no3)2?
The total concentration (or molarity) of nitrate ions in the mixed solution will be 2 M (2 mol/L).
The nitrate ion in the final solution will originate from both nitric acid and magnesium nitrate. To find the final molarity, it is easiest to find the number of moles originating from nitric acid, then do the same for magnesium nitrate, add those moles together, and divide them by the total volume.
Because 1 mol of nitric acid generates 1 mol of nitrate ions, the amount of nitrate ions will be equal to the amount of nitric acid.
c = n/V ⇒ n = V*c = 0.100 L * 0.200 M = 0.02 mol
On the other hand, 1 mol of magnesium nitrate generates 2 moles of nitrate ions, so the amount of nitrate ions will be double the amount of magnesium nitrate.
n = V*c = 0.200 L * 0.100 M = 0.02 mol of magnesium nitrate ⇒ 0.04 mol of nitrate ions
total amount = 0.02 mol + 0.04 mol = 0.06 mol
total volume = 0.100 L + 0.02 L = 0.03 L
c = n/V = 0.06 mol / 0.03 L = 2 M
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How much oxygen, in moles, would have to be produced to meet the needs of one person for one week, assuming a person breathes 900 grams of oxygen per day?.
The oxygen which will be consumed by a person in 1 week is 393.75 moles.
The ratio of a substance's given mass in a chemical reaction to the mass of one mole of that material is the number of moles of that substance. A mole of any substance is equal to 6.023 × 10²³ or Avogadro's number. Molecular weight and other concentration units like mole per liter are also expressed using it.
No. of moles = given mass of substance / Molar mass of a substance
here, given mass = 900g
molar mass = 16g
No. of moles = 900/16 =56.25 moles
This means that 56.25 moles are consumed by a person in 1 day
No. of moles of oxygen consumed in 1 week = 56.25 ×7 = 393.75 moles
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using nad and nadh (no structures needed) write out the reaction for the oxidation of methanol (ch3-oh) to formaldehyde, in which nad is the oxidizing agent. we won’t encounter this reaction, but it is a lot like ones we will.
Using NAD and NADH reaction for the oxidation of methanol CH₃OH to formaldehyde, in which NAD is the oxidizing agent and then alcohol oxidase was crystallized after purification by ammonium sulfate precipitation
Oxidation means a process in which a chemical substance changes because of the addition of oxygen
Methanol was oxidized to formaldehyde by an alcohol oxidase and the reaction are
CH₃OH+O₂ → HCOH + H₂O₂
And the cofactor found in two form of cell and NAD is an oxidizing agent and it accept the electron of other molecule and reduced and this reaction is also with H⁺ form NADH which can be used as the reducing agent to donate electron and this reaction gives alcohol oxidase was crystallized after purification by ammonium sulfate precipitation
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to increase the water solubility of resorcinol or salicylic acid, 3m naoh is used to dissolve them. why do they dissolve better in naoh than in water?
To increase the water solubility of resorcinol or salicylic acid, 3m naoh is used to dissolve them. the reason why they dissolve better in NAOH than in water is because resorcinol as well as salicylic acid have some measures of acidic hydrogens and so they can be ionized inside of NaOH.
How does salicylic acid dissolve in water?
Salicylic acid must be transformed into salicylate because it is insufficiently soluble in water at room temperature to produce the composition you want.
Note that Salicylic acid can be used to accomplish this by reacting with sodium bicarbonate (baking soda) in water; the salicylic acid will dissolve during the reaction.
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A glass container was initially charged with 1.90 moles of a gas sample at 4.00 atm and 21.7 °C. Some of the gas was released as the temperature was increased to 29.1 °C, so the final pressure in the container was reduced to 1.05 atm. How many moles of the gas sample are present at the end?
The no. of moles of the gas sample are present at the end is 0.486 moles
The ideal gas law is :
PV = nRT
here,
P is pressure = 4.00 atm
T is temperature = 21.7 °C = 294.7 K
n is moles = 1.90 moles
R is gas constant
V = n RT / P
= (1.90 × 0.082 × 294.7) / 4
= 11.47 L
Now when temperature is 302.1 K , pressure is 1.05 atm and volume is 11.47 L then the moles will be :
PV = n RT
n = PV / RT
= ( 1.05 × 11.47 ) /( 0.082 × 302.1 )
= 12.04 / 24.77
= 0.486 moles
Thus , A glass container was initially charged with 1.90 moles of a gas sample at 4.00 atm and 21.7 °C. some of the gas was released as the temperature was increased to 29.1 °C, so the final pressure in the container was reduced to 1.05 atm . the no. of moles of the gas sample are present at the end is 0.486 moles
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pls help 100 PTS worksheet attached
Answer:
It wont let me download the pdf
Explanation:
Answer:
I can’t download it
Explanation:
draw the lewis structure (including resonance structures) for methyl azide (ch3n3) . draw the molecule by placing atoms on the canvas and connecting them with bonds. do not identify the charge on each of these species. include all lone pairs of electrons.
The Lewis structures for methyl azide are shown in the image.
There are three possible Lewis structures for methyl azide. A necessary element of all three is a separation of charges between two of the three nitrogen atoms. Although separation of charges is generally seen as unfavorable, here it is necessary in order to construct Lewis structures with full electron octets for the nitrogen atoms.
The exception is the third structure, in which the leftmost nitrogen atom has a sextet instead, lowering the overall stability of that resonance structure and making it the one with the smallest contribution in the resonance hybrid.
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what does the atomic theory describe
c. A pure substance has "one set of universal properties". What does this mean?
A pure substance has "one set of universal properties". This means they have some of the universal properties in common.
The definition of universal propertyA characteristic that describes some structures up to an isomorphism is known as a universal property in mathematics, more specifically in category theory.
As a result, independent of the construction technique used, some objects can be described using universal properties. For example, one can define polynomial rings as derived from the field of their coefficients, rational numbers as derived from integers, real numbers as derived from integers, and rational numbers as derived from real numbers.
All of these definitions can be made in terms of universal properties. In particular, the concept of universal property offers a simple demonstration of the equality of any real number structures, requiring only that they satisfy the same universal property.
What is the universal property of all substances?Diamagnetism is a feature that all substances share.
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iodine is prepared both in the laboratory and commercially by adding cl2(g) to an aqueous solution containing sodium iodide. 2nai(aq) cl2(g)⟶i2(s) 2nacl(aq) how many grams of sodium iodide, nai, must be used to produce 44.7 g of iodine, i2?
Chemical element iodine has the atomic number 53 and the letter I in its symbol. The heaviest of the stable halogens, it melts under ordinary conditions and forms a semi-lustrous, non-metallic solid.
The chemical element sodium has the atomic number 11 and the symbol Na. It is a delicate, silvery-white metal that is exceedingly reactive. Due to its placement in group 1 of the periodic table, sodium is an alkali metal. 23Na is the only stable isotope of it. The free metal must be synthesized from compounds because it does not exist in nature.
Iodine and sodium metal react chemically to generate sodium iodide, an ionic molecule. It is a white, water-soluble solid made up of a 1:1 mixture of sodium cations and iodide anions in a crystal lattice under normal circumstances. It is mostly utilized in organic chemistry and as a dietary supplement.
mass/MW = 27.2 / 253.8 = 0.107 moles of I2 (mole of I2 = mass/MW).
1 mole I2 equals 2 moles NaI
NaI = 0.1071 x 2 = 0.2142 mol
NaI = 149.8
NaI produced at a rate of 149.8 x 0.2142 = 32.08g
In response, 32.08g of NaI
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How many molecules are in 25 grams of C6H1206?
a person enters a kitchen and smells lemons. the next time the person smells lemons, the scent and name of item producing the scent is remembered. what steps occur to form this memory? place the event in order they occur in the nose and the brain.
Long-term memory formation is a highly dynamic process involving multiple temporal and functional stages including encoding consolidation retrieval storage and reconsolidation.
Scientists believe that smell and memory are so closely linked because the anatomy of the brain allows smell signals to travel to the limbic system so quickly. Experts say that memories associated with smells tend to be older and less thought-provoking, which means the memories are very vivid.
Smells are processed by the olfactory bulb a structure at the front of the brain that sends information to other areas of the body's central command center for further processing. Scents reach directly into the limbic system, which includes the amygdala and hippocampus regions associated with emotion and memory.
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if, at a given temperature, the equilibrium constant for the reaction h2(g) cl2(g) 2hcl(g) is kp, then the equilibrium constant for the reaction hcl(g) h2(g) cl2 (g) can be represented as:
if, at a given temperature, the equilibrium constant for the reaction
H₂ + Cl₂ ----> 2HCl is Kp, then the equilibrium constant for the reaction : 2HCl ----> H₂ + Cl₂ is 1 / Kp.
the equilibrium constant for the reaction
H₂ + Cl₂ ----> 2HCl is Kp,
when we reverse the equation the equilibrium constant becomes reciprocal of original reaction . so the reaction is given as:
2HCl ----> H₂ + Cl₂
this is the reverse reaction of the original reaction ,so the equilibrium constant becomes the reciprocal of the original reaction.
so, the equilibrium constant K'p = 1/ Kp
Thus, if, at a given temperature, the equilibrium constant for the reaction
H₂ + Cl₂ ----> 2HCl is Kp, then the equilibrium constant for the reaction : 2HCl ----> H₂ + Cl₂ is 1 / Kp.
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When attractive forces between molecules are strong in a liquid, the liquid can be described as...
a solid
b.
fluid
C.
viscous
d
definite in shape
When attractive forces between molecules are strong in a liquid, the liquid can be described as solid.
How are attraction forces in solid, liquid, and gas?A solid's internal kinetic energy produces a force that is weaker than the attraction forces between its molecules. The molecules in a solid are kept in close proximity to one another by attraction forces as the attractive forces between molecules are strong.In a liquid, there is more kinetic energy than there is in a solid. In a solid, the stiff attraction between molecules can be broken by kinetic energy. The molecular attraction between them is still strong enough to keep the liquid's molecular structure intact.In comparison to kinetic energy in molecules, kinetic energy in a gas is substantially strong. In a gas, the attraction between the molecules is significantly weaker than the kinetic energy. In this situation, there is no longer any molecular attraction.
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What is the mass of 5.32 x 10^25 atoms of sodium?
Answer:
2031 g or 2.03 kg
Explanation:
1 mole of Na = 22.990 g = 6.022 x 10^23 atoms
so the mass of 5.32 x 10^25 atoms of Na equals
(22.990)(5.32 x 10^25)/(6.022 x 10^23)
= 2030.99966788 g = 2031 g or 2.03 kg
1
Sunlight provides the energy that evaporates water from the surface of Earth. Most water vapor forms over oceans. How does water
vapor from the ocean reach the continents?
OA. It is transported by ocean waves to the continents..
Sunlight brings warm which when fall over oceans or waters evaporate and goes up to sky.
What is water vapor and how sunlight bring about such change?See our nature is all well planted cycle for the water from the rain to the water deposited in ocean.When Sunlight falls on Earth's surface brings about a change in the context of warm.When warm and heat produced by Sunlight fall on oceans, and waters , it evaporates the water and the vapor goes up to the clouds.This all is about the precipitation, a process of natural water cycling from the rain to the ocean to homes to waste to management to recycling to the water that evaporates and form water again.To know more about water vapor visit:
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consider the reaction of glucose in the presence of oxygen to carbon dioxide and water. draw the line that represents the change in free energy (δg) as the reaction proceeds.
The reaction of glucose in the presence of oxygen to carbon dioxide and water is [tex]C_{6} H_{12}O_{6} + O_{2}-- > CO_{2} +H_{2}O +energy[/tex].
The reaction of glucose in the presence of oxygen to carbon dioxide and water.[tex]C_{6} H_{12}O_{6} + O_{2}-- > CO_{2} +H_{2}O +energy[/tex]
Cells break down glucose to release energy through a process known as cellular respiration or respiration. Additionally emitted throughout the process are water and carbon dioxide. Whether there is oxygen present or not, this can occur. Aerobic respiration is the term for respiration that occurs when oxygen is present. Anaerobic respiration is the term used to describe a process that occurs without oxygen.
What happens when oxygen and glucose are combined?This process is an oxidation reaction because glucose and oxygen combine to create energy. This process releases energy and it is an exothermic reaction. The human body oxidizes glucose to provide energy. This reaction with oxygen is hence referred to as an oxidation reaction.
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A chemical reaction with 28g of reactants is completed in a closed system (all of the reactants are used up and none of the products escape). What is the mass of the products?
From the law of the conservation of mass, we can see that the mass of the products in the system is 28 g.
What is the Law of conservation of mass?The law of conservation of mass states that the mass of the system before the reaction ought to be the same as the mass of the system after reaction. Seeing that we have 28g of reactants is completed in a closed system (all of the reactants are used up and none of the products escape), we now now need to determine the mass of the products.
If we consider the law of conservation of mass, then we must have to agree that the mass of the product would be 28 g.
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in the standardization part, how would the calculated naoh concentration be affected if some of the acid solution were splashed onto the flask walls and was not rinsed down before reaching the end point? would it be higher than the actual concentration, lower, or would there be no effect? explain.
The outcome won't be exact. Any liquid, including basic and acidic liquids, could contaminate it.
Why do we standardize the NaOH solution ?To determine the precise concentration of a solution whose concentration is unknown, a NaOH solution must be standardized. To obtain an equivalence point and determine the unknown concentration, standardization involves titrating a known volume of NaOH with an acid in a flask.
Purpose of standardizing the NaOH solution :To determine the precise concentration, you will standardize a NaOH solution in this experiment. You will use standardized NaOH to calculate the concentrations of HCl and HC2H3O2 solutions in subsequent experiments. You'll discover various indicators for endpoint detection.
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acetylene c2h2 gas is often used in welding torches because of the very high heat produced when it reacts with oxygen o2 gas, producing carbon dioxide gas and water vapor. calculate the moles of carbon dioxide produced by the reaction of 0.055mol of oxygen. be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. .083mol
The moles of carbon dioxide produced by the reaction acetylene of 0.055mol of oxygen is 0.044 mole.
Acetylene is a chemical compound with the formula C₂H₂ and structure H−C≡C−H. it is a hydrocarbon and the best alkyne. This colorless fuel is widely used as a gas and a chemical constructing block. it is unstable in its pure form and consequently is usually handled as a solution.
The balanced chemical reaction is,
2C₂H₂ (g) + 5O₂ (g) ===> 4CO₂ (g) + 2H₂O (g)
2 C2H2 (g) + 5 O2 (g) --------> 4 CO2 (g) + 2 H2O (g)
2 mol acetylene --------> 4 mol CO2
?? C2H2 ------------> 0.055 mol Co2
moles of acetylene = 0.055 x 2 / 4
= 0.0275 mol
moles of acetylene = 0.028 mol
5 mole of oxygen produced = 4 mole of CO₂
0.055mol of oxygen = 4/5 × 0.055
= 0.044 mole
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Describe the parts of an atom including location, charge, mass and what each part determines about the atom.
Answer:
1. Protons: located in the nucleus, positive charge, mass is 1 amu
2. Neutron: located in nucleus, neutral charge, mass is 1 amu
3. Electron: located in the 3 dimensional space around the nucleus, negative charge, nearly massless when compared to protons and neutrons
Explanation:
At a fixed temperature and pressure, the volume occupied by a gas is _____ proportional to the number of moles of gas present. For ideal gases under these conditions, equal _____ of gas contain equal numbers of particles or moles.
directly, volumes
At a fixed temperature and pressure, the volume occupied by a gas is directly proportional to the number of moles of gas present. For ideal gases under these conditions, equal volumes of gas contain equal numbers of particles or moles.
The physical behavior of a sample of gas can be described completely by the four variables, pressure (P), volume (V), temperature (T) and quantity (moles). These variables are interdependent. Any one of them can be determined by knowing the other three.
The volume occupied by a mole of gas at STP ( same temperature and pressure) is called the standard molar volume and is very nearly a constant for gases.
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A. Which atom in each pair would have the larger atomic radii?
1. Li or Cs
2. K or Br
3. Li or F
4. C or Pb
B. In the question above, justify your choice for K and Br. Note: you have to relate it to the structure of the atom, not just where it is at on the periodic table.
Based on the atomic structure of the given elements, the atoms in each pair having the larger atomic radii are as follows:
CsKLiPbWhat is the atomic radius of an atom?The atomic radius of an atom is the radius of the atom of an element.
It is measured as half the distance between the nucleus of two covalently bonded atoms of the element.
The atomic radius of an atom increases with an increase in electron shells or orbital but decreases with an increase in atomic number in atoms with the same number of electron shells.
Comparing the atomic radii of the given elements:
1. Li or Cs - Cs has the larger atomic radii because of greater atomic orbitals
2. K or Br - K has a greater atomic radius because it has a smaller atomic number with the same number of orbitals as Br.
3. Li or Fluorine - Li has a greater atomic radius because it has a smaller atomic number with the same number of orbitals as Fluorine.
4. C or Pb - Pb has the larger atomic radii because of greater atomic orbitals
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