Question 1

How many Li atoms are contained in 97.9 g of Li?

Accepted Answer

A)  5.90 × 1025 Li atoms 
B)  7.09 × 1021 Li atoms 
C)  8.49 × 1024 Li atoms 
D)  4.27 × 1022 Li atoms 
E)  4.18 × 1024 Li atoms 
A)  5.90 × 1025 Li atoms 
B)  7.09 × 1021 Li atoms 
C)  8.49 × 1024 Li atoms 
D)  4.27 × 1022 Li atoms 
E)  4.18 × 1024 Li atoms

Question 2

Which of the following elements is a metal?

Accepted Answer

A)  As 
B)  C 
C)  I 
D)  Sn 
E)  Se 
A)  As 
B)  C 
C)  I 
D)  Sn 
E)  Se

Question 3

The atomic mass of tungsten is 183.84 u. Given the following information for the mass and abundance of the other common isotopes, calculate the atomic mass of tungsten-186. 
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 28.43%

Accepted Answer

A)  185.75 u 
B)  186.48 u 
C)  186.98 u 
D)  184.41 u 
E)  185.95 u 
A)  185.75 u 
B)  186.48 u 
C)  186.98 u 
D)  184.41 u 
E)  185.95 u

Question 4

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

Accepted Answer

A)  p+ = 12 n° = 25 e- = 12 
B)  p+ = 12 n° = 12 e- = 13 
C)  p+ = 12 n° = 13 e- = 12 
D)  p+ = 25 n° = 12 e- = 13 
E)  p+ = 12 n° = 13 e- = 25 
A)  p+ = 12 n° = 25 e- = 12 
B)  p+ = 12 n° = 12 e- = 13 
C)  p+ = 12 n° = 13 e- = 12 
D)  p+ = 25 n° = 12 e- = 13 
E)  p+ = 12 n° = 13 e- = 25

Question 5

An atom of 17F contains ________ electrons.

Accepted Answer

A)  26 
B)  8 
C)  15 
D)  9 
E)  17 
A)  26 
B)  8 
C)  15 
D)  9 
E)  17

Question 6

Semiconductors are ________.

Accepted Answer

A)  metalloids 
B)  noble gases 
C)  nonmetals 
D)  metals 
A)  metalloids 
B)  noble gases 
C)  nonmetals 
D)  metals

Question 7

How many molecules are in 2.50 moles of CO2?

Accepted Answer

A)  4.52 × 1024 molecules 
B)  1.51 × 1024 molecules 
C)  5.02 × 1023 molecules 
D)  3.01 × 1024 molecules 
E)  7.53 × 1023 molecules 
A)  4.52 × 1024 molecules 
B)  1.51 × 1024 molecules 
C)  5.02 × 1023 molecules 
D)  3.01 × 1024 molecules 
E)  7.53 × 1023 molecules

Question 8

In which of the following sets do all species have the same number of protons?

Accepted Answer

A)  Br-, Kr, Sr2+ 
B)  C, N3-, O2- 
C)  Mg2+, Sr2+, Ba2+ 
D)  O, O2-, O2+ 
A)  Br-, Kr, Sr2+ 
B)  C, N3-, O2- 
C)  Mg2+, Sr2+, Ba2+ 
D)  O, O2-, O2+

Question 9

Which of the following elements is a halogen?

Accepted Answer

A)  Ne 
B)  I 
C)  O 
D)  Mg 
E)  K 
A)  Ne 
B)  I 
C)  O 
D)  Mg 
E)  K

Question 10

An ion has 17 protons, 20 neutrons, and 18 electrons. The symbol for the ion is ________.

Accepted Answer

A)  (37Cl-) 
B)  (37Cl+) 
C)  (38S+) 
D)  (38S-) 
E)  (37S2+) 
A)  (37Cl-) 
B)  (37Cl+) 
C)  (38S+) 
D)  (38S-) 
E)  (37S2+)

Question 11

How many iron atoms are contained in 354 g of iron?

Accepted Answer

A)  2.62 × 1025 Fe atoms 
B)  2.13 × 1026 Fe atoms 
C)  4.69 × 1024 Fe atoms 
D)  3.82 × 1024 Fe atoms 
E)  9.50 × 1022 Fe atoms 
A)  2.62 × 1025 Fe atoms 
B)  2.13 × 1026 Fe atoms 
C)  4.69 × 1024 Fe atoms 
D)  3.82 × 1024 Fe atoms 
E)  9.50 × 1022 Fe atoms

Question 12

What does "X" represent in the following symbol?   X

Accepted Answer

A)  silicon 
B)  sulfur 
C)  zinc 
D)  ruthenium 
E)  nickel 
A)  silicon 
B)  sulfur 
C)  zinc 
D)  ruthenium 
E)  nickel

Question 13

Which of the following statements is TRUE?

Accepted Answer

A)  Cations are usually larger than their corresponding atom. 
B)  Metals tend to form cations. 
C)  Atoms are usually larger than their corresponding anion. 
D)  The halogens tend to form 1+ ions. 
E)  Nonmetals tend to lose electrons. 
A)  Cations are usually larger than their corresponding atom. 
B)  Metals tend to form cations. 
C)  Atoms are usually larger than their corresponding anion. 
D)  The halogens tend to form 1+ ions. 
E)  Nonmetals tend to lose electrons.

Question 14

Cerium has four stable isotopes listed below. If the weighted average atomic mass of cerium is 140.116 u, calculate the atomic mass of cerium-142. 
Ce-136 135.90714 u 0.19%
Ce-138 137.90599 u 0.25%
Ce-140 139.90543 u 88.43%
Ce-142 11.13%

Accepted Answer

A)  141.911 u 
B)  142.617 u 
C)  140.334 u 
D)  142.501 u 
E)  139.886 u 
A)  141.911 u 
B)  142.617 u 
C)  140.334 u 
D)  142.501 u 
E)  139.886 u

Question 15

Cesium belongs to the ________ group of the periodic table.

Accepted Answer

A)  alkali metal 
B)  alkaline earth metal 
C)  halogen 
D)  noble gas 
A)  alkali metal 
B)  alkaline earth metal 
C)  halogen 
D)  noble gas

Question 16

If 102.7 g of tin is mixed with 10.9 g of copper to create the alloy pewter, how many metal atoms total are present in the pewter?

Accepted Answer

A)  5.81 × 1023 metal atoms 
B)  5.22 × 1023 metal atoms 
C)  3.75 × 1023 metal atoms 
D)  9.66 × 1023 metal atoms 
E)  6.24 × 1023 metal atoms 
A)  5.81 × 1023 metal atoms 
B)  5.22 × 1023 metal atoms 
C)  3.75 × 1023 metal atoms 
D)  9.66 × 1023 metal atoms 
E)  6.24 × 1023 metal atoms

Question 17

How many protons are in arsenic?

Accepted Answer

A)  33 
B)  41 
C)  42 
D)  41.9 
E)  75 
A)  33 
B)  41 
C)  42 
D)  41.9 
E)  75

Question 18

Which element has the chemical symbol S?

Accepted Answer

A)  selenium 
B)  silicon 
C)  sulfur 
D)  scandium 
A)  selenium 
B)  silicon 
C)  sulfur 
D)  scandium

Question 19

What is the atomic number for tin?

Accepted Answer

A)  47.87 
B)  50 
C)  118.71 
D)  22 
A)  47.87 
B)  50 
C)  118.71 
D)  22

Question 20

How many electrons are in the ion Cu2+?

Accepted Answer

A)  27 
B)  29 
C)  31 
D)  64 
A)  27 
B)  29 
C)  31 
D)  64

Exam 2: Atoms and Elements

How many Li atoms are contained in 97.9 g of Li?

Which of the following elements is a metal?

The atomic mass of tungsten is 183.84 u. Given the following information for the mass and abundance of the other common isotopes, calculate the atomic mass of tungsten-186. 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 28.43%

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

An atom of 17F contains ________ electrons.

Semiconductors are ________.

How many molecules are in 2.50 moles of CO2?

In which of the following sets do all species have the same number of protons?

Which of the following elements is a halogen?

An ion has 17 protons, 20 neutrons, and 18 electrons. The symbol for the ion is ________.

How many iron atoms are contained in 354 g of iron?

What does "X" represent in the following symbol? X

Which of the following statements is TRUE?

Cerium has four stable isotopes listed below. If the weighted average atomic mass of cerium is 140.116 u, calculate the atomic mass of cerium-142. Ce-136 135.90714 u 0.19% Ce-138 137.90599 u 0.25% Ce-140 139.90543 u 88.43% Ce-142 11.13%

Cesium belongs to the ________ group of the periodic table.

If 102.7 g of tin is mixed with 10.9 g of copper to create the alloy pewter, how many metal atoms total are present in the pewter?

How many protons are in arsenic?

Which element has the chemical symbol S?

What is the atomic number for tin?

How many electrons are in the ion Cu2+?

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

An atom of ¹⁷F contains ________ electrons.

How many molecules are in 2.50 moles of CO₂?

How many electrons are in the ion Cu²⁺?