Question 1

An isotope with 22 neutrons and 18 protons is what?

Accepted Answer

A)  ${ }_{18}^{42} \mathrm{Ar}$ 
B)  ${ }_{18}^{22} \mathrm{Ar}$ 
C)  ${ }_{18}^{40} \mathrm{Ar}$ 
D)  ${ }_{22}^{18} \mathrm{Ar}$ 
A)  ${ }_{18}^{42} \mathrm{Ar}$ 
B)  ${ }_{18}^{22} \mathrm{Ar}$ 
C)  ${ }_{18}^{40} \mathrm{Ar}$ 
D)  ${ }_{22}^{18} \mathrm{Ar}$

Question 2

An atom of Fe contains how many electrons?

Accepted Answer

A) 25 
B) 26 
C) 55 
D) 56 
A) 25 
B) 26 
C) 55 
D) 56

Question 3

All isotopes of hydrogen have what in common?

Accepted Answer

A) Atomic size 
B) Molecular formula 
C) Atomic mass 
D) The atomic number 
A) Atomic size 
B) Molecular formula 
C) Atomic mass 
D) The atomic number

Question 4

What is the ground state of an atom?

Accepted Answer

A) The state in which all electrons are in the lowest possible energy level 
B) The state in which electrons have been promoted to the lowest possible energy level 
C) The state in which multiple electrons are located in one of two levels 
D) The state in which all electrons are in their highest possible energy level 
A) The state in which all electrons are in the lowest possible energy level 
B) The state in which electrons have been promoted to the lowest possible energy level 
C) The state in which multiple electrons are located in one of two levels 
D) The state in which all electrons are in their highest possible energy level

Question 5

When an element has Z=15 and 15 neutrons, what element and isotope are present?

Accepted Answer

A)  ${ }_{15}^{30} \mathrm{p}$ 
B)  ${ }_{15}^{31} \mathrm{P}$ 
C)  ${ }_{15}^{15} \mathrm{P}$ 
D)  ${ }_{30}^{15} \mathrm{P}$ 
A)  ${ }_{15}^{30} \mathrm{p}$ 
B)  ${ }_{15}^{31} \mathrm{P}$ 
C)  ${ }_{15}^{15} \mathrm{P}$ 
D)  ${ }_{30}^{15} \mathrm{P}$

Question 6

Where on the Earth are carbon dioxide levels "recorded" throughout history?

Accepted Answer

A) In ocean waters 
B) In fresh water bodies 
C) In ice cores 
D) In precipitation 
A) In ocean waters 
B) In fresh water bodies 
C) In ice cores 
D) In precipitation

Question 7

What is the shape of a p orbital?

Accepted Answer

A) Oblong 
B) Doughnut shaped 
C) Dumbbell 
D) Spherical 
A) Oblong 
B) Doughnut shaped 
C) Dumbbell 
D) Spherical

Question 8

Technetium is a synthetic element. Which isotope is its major one?

Accepted Answer

A) 97 
B) 98 
C) 99 
D) Not enough information to tell 
A) 97 
B) 98 
C) 99 
D) Not enough information to tell

Question 9

According to the ancient, Greek philosophers who believed in atoms, how were they categorized?

Accepted Answer

A) By sizes, proton counts, and aromas 
B) By weights, aromas, and taste 
C) By various sizes, weights, and shapes 
D) By various sizes, weights, and aromas 
A) By sizes, proton counts, and aromas 
B) By weights, aromas, and taste 
C) By various sizes, weights, and shapes 
D) By various sizes, weights, and aromas

Question 10

The two compounds SO2 and SO3 are both made only from oxygen and sulfur, but represent an example of which of Dalton's Laws?

Accepted Answer

A) The law of conservation of mass 
B) The law of multiple proportions 
C) The atomic theory 
D) The law of conservation of charge 
A) The law of conservation of mass 
B) The law of multiple proportions 
C) The atomic theory 
D) The law of conservation of charge

Question 11

The full electron configuration for C is:

Accepted Answer

A) 1s2 2s2 2p6 
B) 1s2 2s2 2p4 
C) 1s2 2s2 2p2 
D) 1s2 2s2 
A) 1s2 2s2 2p6 
B) 1s2 2s2 2p4 
C) 1s2 2s2 2p2 
D) 1s2 2s2

Question 12

The law of definite proportions states that a compound or mixture is always composed of the same relative masses of its elements.

Accepted Answer

A) True 
 B)False

Question 13

What does the symbol e- represent?

Accepted Answer

A) Proton 
B) Neutron 
C) Element 
D) Electron 
A) Proton 
B) Neutron 
C) Element 
D) Electron

Question 14

The isotope of carbon with the symbol ${ }_{6}^{13} \mathrm{C}$ has how many neutrons?

Accepted Answer

A) 6 
B) 7 
C) 13 
D) 1 
A) 6 
B) 7 
C) 13 
D) 1

Question 15

Atoms of U all contain how many electrons?

Accepted Answer

A) 91 
B) 92 
C) 238 
D) 146 
A) 91 
B) 92 
C) 238 
D) 146

Question 16

What is a line spectrum?

Accepted Answer

The light emitted fr

Question 17

The isotope of cobalt with the symbol ${ }_{27}^{59} \mathrm{Co}$ has how many electrons?

Accepted Answer

A) 33 
B) 32 
C) 59 
D) 27 
A) 33 
B) 32 
C) 59 
D) 27

Question 18

When do atoms produce light?

Accepted Answer

When placed in a fla

Question 19

When an element has 12 neutrons and a Z=12, what element and isotope are present?

Accepted Answer

A)  ${ }_{12}^{24} \mathrm{Mg}$ 
B)  ${ }_{12}^{12} \mathrm{Mg}$ 
C)  ${ }_{24}^{24} \mathrm{Mg}$ 
D)  ${ }_{24}^{24} \mathrm{Cr}$ 
A)  ${ }_{12}^{24} \mathrm{Mg}$ 
B)  ${ }_{12}^{12} \mathrm{Mg}$ 
C)  ${ }_{24}^{24} \mathrm{Mg}$ 
D)  ${ }_{24}^{24} \mathrm{Cr}$

Question 20

In a reaction in which 54.0 g of HgO is heated, liberating 43.0 g of mercury, how much oxygen must also have been produced?

Accepted Answer

A) 97.0 g 
B) 1.2 g 
C) 11.0 g 
D) 0.8 g 
A) 97.0 g 
B) 1.2 g 
C) 11.0 g 
D) 0.8 g

An isotope with 22 neutrons and 18 protons is what?

An atom of Fe contains how many electrons?

All isotopes of hydrogen have what in common?

What is the ground state of an atom?

When an element has Z=15 and 15 neutrons, what element and isotope are present?

Where on the Earth are carbon dioxide levels "recorded" throughout history?

What is the shape of a p orbital?

Technetium is a synthetic element. Which isotope is its major one?

According to the ancient, Greek philosophers who believed in atoms, how were they categorized?

The two compounds SO₂ and SO₃ are both made only from oxygen and sulfur, but represent an example of which of Dalton's Laws?

The full electron configuration for C is:

The law of definite proportions states that a compound or mixture is always composed of the same relative masses of its elements.

What does the symbol e^- represent?

The isotope of carbon with the symbol ${ }_{6}^{13} \mathrm{C}$ has how many neutrons?

Atoms of U all contain how many electrons?

What is a line spectrum?

The isotope of cobalt with the symbol ${ }_{27}^{59} \mathrm{Co}$ has how many electrons?

When do atoms produce light?

When an element has 12 neutrons and a Z=12, what element and isotope are present?

In a reaction in which 54.0 g of HgO is heated, liberating 43.0 g of mercury, how much oxygen must also have been produced?

Understanding Our World With Chemistry

Matter: Properties, Changes and Measurements

Bonding and Reactions

Chemistry of Bonding: Structure and Function of Drug Molecules

Aqueous Solutions: Part I

Aqueous Solutions: Part II

Organic Chemistry and Polymers

Chemistry of Fire and Heat

Chemistry of Explosions

Applications of Chemical Kinetics

Nuclear Chemistry: Energy, Medicine, Weapons, and Terrorism

Chemical Equilibrium

Introduction to Biochemistry

Filters

Exam 3: Understanding Atoms

An isotope with 22 neutrons and 18 protons is what?

An atom of Fe contains how many electrons?

All isotopes of hydrogen have what in common?

What is the ground state of an atom?

When an element has Z=15 and 15 neutrons, what element and isotope are present?

Where on the Earth are carbon dioxide levels "recorded" throughout history?

What is the shape of a p orbital?

Technetium is a synthetic element. Which isotope is its major one?

According to the ancient, Greek philosophers who believed in atoms, how were they categorized?

The two compounds SO2 and SO3 are both made only from oxygen and sulfur, but represent an example of which of Dalton's Laws?

The full electron configuration for C is:

The law of definite proportions states that a compound or mixture is always composed of the same relative masses of its elements.

What does the symbol e- represent?

The isotope of carbon with the symbol 613C{ }_{6}^{13} \mathrm{C}613​C has how many neutrons?

Atoms of U all contain how many electrons?

What is a line spectrum?

The isotope of cobalt with the symbol 2759Co{ }_{27}^{59} \mathrm{Co}2759​Co has how many electrons?

When do atoms produce light?

When an element has 12 neutrons and a Z=12, what element and isotope are present?

In a reaction in which 54.0 g of HgO is heated, liberating 43.0 g of mercury, how much oxygen must also have been produced?

Understanding Our World With Chemistry

Matter: Properties, Changes and Measurements

Bonding and Reactions

Chemistry of Bonding: Structure and Function of Drug Molecules

Aqueous Solutions: Part I

Aqueous Solutions: Part II

Organic Chemistry and Polymers

Chemistry of Fire and Heat

Chemistry of Explosions

Applications of Chemical Kinetics

Nuclear Chemistry: Energy, Medicine, Weapons, and Terrorism

Chemical Equilibrium

Introduction to Biochemistry

Filters

The two compounds SO₂ and SO₃ are both made only from oxygen and sulfur, but represent an example of which of Dalton's Laws?

What does the symbol e^- represent?

The isotope of carbon with the symbol ${ }_{6}^{13} \mathrm{C}$ has how many neutrons?

The isotope of cobalt with the symbol ${ }_{27}^{59} \mathrm{Co}$ has how many electrons?