Question 1

How many dozen are in one mole?

Accepted Answer

A)  12 dozen 
B)  6.0 × 1023 dozen 
C)  2.0 × 10-23 dozen 
D)  5.0 × 1022 dozen 
E)  2.0 × 1023 dozen 
A)  12 dozen 
B)  6.0 × 1023 dozen 
C)  2.0 × 10-23 dozen 
D)  5.0 × 1022 dozen 
E)  2.0 × 1023 dozen

Question 2

How many silver atoms are contained in 3.75 moles of silver?

Accepted Answer

A)  6.23 × 1024 silver atoms 
B)  2.26 × 1024 silver atoms 
C)  1.61 × 1023 silver atoms 
D)  2.44 × 1026 silver atoms 
E)  6.50 × 1025 silver atoms 
A)  6.23 × 1024 silver atoms 
B)  2.26 × 1024 silver atoms 
C)  1.61 × 1023 silver atoms 
D)  2.44 × 1026 silver atoms 
E)  6.50 × 1025 silver atoms

Question 3

How many moles of Cs are contained in 595 kg of Cs?

Accepted Answer

A)  2.23 × 102 moles Cs 
B)  4.48 × 103 moles Cs 
C)  7.91 × 104 moles Cs 
D)  1.26 × 103 moles Cs 
E)  5.39 × 102 moles Cs 
A)  2.23 × 102 moles Cs 
B)  4.48 × 103 moles Cs 
C)  7.91 × 104 moles Cs 
D)  1.26 × 103 moles Cs 
E)  5.39 × 102 moles Cs

Question 4

When forming an ion, rubidium, Rb, will ________ electron(s).

Accepted Answer

A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two 
A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two

Question 5

The atomic number of an atom of 80Br is ________.

Accepted Answer

A)  115 
B)  35 
C)  45 
D)  73 
E)  80 
A)  115 
B)  35 
C)  45 
D)  73 
E)  80

Question 6

How many atoms of chlorine are in 354.53 g of chlorine?

Accepted Answer

A)  6.02214 × 10-23 
B)  6.02214 × 1023 
C)  6.02214 × 1024 
D)  6.02214 × 1025 
E)  6.02214 × 10-24 
A)  6.02214 × 10-23 
B)  6.02214 × 1023 
C)  6.02214 × 1024 
D)  6.02214 × 1025 
E)  6.02214 × 10-24

Question 7

Calculate the mass (in kg) of 4.87 × 1025 atoms of Zn.

Accepted Answer

A)  5.29 kg 
B)  1.89 kg 
C)  8.09 kg 
D)  1.24 kg 
E)  1.09 kg 
A)  5.29 kg 
B)  1.89 kg 
C)  8.09 kg 
D)  1.24 kg 
E)  1.09 kg

Question 8

Lithium tends to lose ________ electron(s) to attain a noble gas configuration.

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  2 
E)  1 
A)  3 
B)  4 
C)  5 
D)  2 
E)  1

Question 9

If 6.0 g of carbon combines with 16.0 g of oxygen to form 22.0 g of carbon dioxide, how much carbon and oxygen, in grams, is in 28.7 g carbon dioxide?

Accepted Answer

A)  20.9 g carbon and 7.8 g oxygen 
B)  20.9 g carbon and 10.5 g oxygen 
C)  7.8 g carbon and 20.9 g oxygen 
D)  7.8 g carbon and 10.5 g oxygen 
E)  3.9 g carbon and 20.9 g oxygen 
A)  20.9 g carbon and 7.8 g oxygen 
B)  20.9 g carbon and 10.5 g oxygen 
C)  7.8 g carbon and 20.9 g oxygen 
D)  7.8 g carbon and 10.5 g oxygen 
E)  3.9 g carbon and 20.9 g oxygen

Question 10

Gallium has an atomic mass of 69.723 u. The abundance of Ga-69 (68.926 u) is 60.11%. What is the atomic mass, in u, of the other isotope?

Accepted Answer

A)  70.92 u 
B)  70.93 u 
C)  70.94 u 
D)  70.91 u 
E)  70.930 u 
A)  70.92 u 
B)  70.93 u 
C)  70.94 u 
D)  70.91 u 
E)  70.930 u

Question 11

How many phosphorus atoms are contained in 158 kg of phosphorus?

Accepted Answer

A)  3.07 × 1027 phosphorus atoms 
B)  2.95 × 1027 phosphorus atoms 
C)  3.25 × 1028 phosphorus atoms 
D)  1.18 × 1024 phosphorus atoms 
E)  8.47 × 1024 phosphorus atoms 
A)  3.07 × 1027 phosphorus atoms 
B)  2.95 × 1027 phosphorus atoms 
C)  3.25 × 1028 phosphorus atoms 
D)  1.18 × 1024 phosphorus atoms 
E)  8.47 × 1024 phosphorus atoms

Question 12

When forming an ion, iodine, I, will ________ electron(s).

Accepted Answer

A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two 
A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two

Question 13

When two elements, A and B, form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to?

Accepted Answer

A)  Law of definite proportions 
B)  Law of the conservation of mass 
C)  Law of modern atomic theory 
D)  Law of multiple proportions 
E)  First law of thermodynamics 
A)  Law of definite proportions 
B)  Law of the conservation of mass 
C)  Law of modern atomic theory 
D)  Law of multiple proportions 
E)  First law of thermodynamics

Question 14

What mass of calcium is required to produce 4.2 g of calcium bromide, starting with 3.4 g of bromine?

Accepted Answer

A)  0.4 g 
B)  3.4 g 
C)  4.2 g 
D)  1.6 g 
E)  0.8 g 
A)  0.4 g 
B)  3.4 g 
C)  4.2 g 
D)  1.6 g 
E)  0.8 g

Question 15

Calculate the atomic mass of tungsten given the atomic mass and percent abundance for the following isotopes: 
W-180 179.9467 u 0.12%
W-182 181.9482 u 26.50%
W-183 182.9502 u 14.31%
W-184 183.9509 u 30.64%
W-186 185.9544 u 28.43%

Accepted Answer

A)  183.75 u 
B)  183.84 u 
C)  182.98 u 
D)  184.41 u 
E)  183.92 u 
A)  183.75 u 
B)  183.84 u 
C)  182.98 u 
D)  184.41 u 
E)  183.92 u

Question 16

Determine the number of protons, neutrons, and electrons in the following:   X

Accepted Answer

A)  p+ = 18 n° = 18 e- = 22 
B)  p+ = 18 n° = 22 e- = 18 
C)  p+ = 22 n° = 18 e- = 18 
D)  p+ = 18 n° = 22 e- = 40 
E)  p+ = 40 n° = 22 e- = 18 
A)  p+ = 18 n° = 18 e- = 22 
B)  p+ = 18 n° = 22 e- = 18 
C)  p+ = 22 n° = 18 e- = 18 
D)  p+ = 18 n° = 22 e- = 40 
E)  p+ = 40 n° = 22 e- = 18

Question 17

Identify the element that has an atomic number of 40.

Accepted Answer

A)  neon 
B)  calcium 
C)  zirconium 
D)  bromine 
A)  neon 
B)  calcium 
C)  zirconium 
D)  bromine

Question 18

Match the following.
-iron

Accepted Answer

A) Mg 
B) Fe 
C) Si 
D) K 
E) C 
A) Mg 
B) Fe 
C) Si 
D) K 
E) C

Question 19

Give the name of the element whose symbol is Na.

Accepted Answer

The answer of Give the name of the element whose...

Question 20

Describe an atom and what it is made up of according to modern atomic theory.

Accepted Answer

An atom is made up of a nucleus surround

Exam 2: Atoms and Elements

How many dozen are in one mole?

How many silver atoms are contained in 3.75 moles of silver?

How many moles of Cs are contained in 595 kg of Cs?

When forming an ion, rubidium, Rb, will ________ electron(s).

The atomic number of an atom of 80Br is ________.

How many atoms of chlorine are in 354.53 g of chlorine?

Calculate the mass (in kg) of 4.87 × 1025 atoms of Zn.

Lithium tends to lose ________ electron(s) to attain a noble gas configuration.

If 6.0 g of carbon combines with 16.0 g of oxygen to form 22.0 g of carbon dioxide, how much carbon and oxygen, in grams, is in 28.7 g carbon dioxide?

Gallium has an atomic mass of 69.723 u. The abundance of Ga-69 (68.926 u) is 60.11%. What is the atomic mass, in u, of the other isotope?

How many phosphorus atoms are contained in 158 kg of phosphorus?

When forming an ion, iodine, I, will ________ electron(s).

When two elements, A and B, form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to?

What mass of calcium is required to produce 4.2 g of calcium bromide, starting with 3.4 g of bromine?

Calculate the atomic mass of tungsten given the atomic mass and percent abundance for the following isotopes: W-180 179.9467 u 0.12% W-182 181.9482 u 26.50% W-183 182.9502 u 14.31% W-184 183.9509 u 30.64% W-186 185.9544 u 28.43%

Determine the number of protons, neutrons, and electrons in the following: X

Identify the element that has an atomic number of 40.

Match the following. -iron

Give the name of the element whose symbol is Na.

Describe an atom and what it is made up of according to modern atomic theory.

Units of Measurement for Physical and Chemical Change

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

The atomic number of an atom of ⁸⁰Br is ________.

Calculate the mass (in kg) of 4.87 × 10²⁵ atoms of Zn.