Question 1

Solar fuels such as hydrogen are being studied as sources of energy. All of the following statements about hydrogen as a fuel source are true EXCEPT

Accepted Answer

A)  Fuels that are produced using sunlight as the energy source and water as the chemical feedstock are clean and renewable. 
B)  Solar-hydrogen systems use materials that are abundant and do not harm the environment. 
C)  Significant amounts of carbon dioxide would be emitted. 
D)  Solar-hydrogen systems rely on compounds that increase efficiency. 
A)  Fuels that are produced using sunlight as the energy source and water as the chemical feedstock are clean and renewable. 
B)  Solar-hydrogen systems use materials that are abundant and do not harm the environment. 
C)  Significant amounts of carbon dioxide would be emitted. 
D)  Solar-hydrogen systems rely on compounds that increase efficiency.

Question 2

How many nucleons are in this isotope of tin?   Sn

Accepted Answer

A)  50 
B)  72 
C)  122 
D)  194 
A)  50 
B)  72 
C)  122 
D)  194

Question 3

Carbon has ________ valence electrons.

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four

Question 4

Give the main shell configuration for chlorine.

Accepted Answer

A)  17 
B)  18 
C)  2, 8, 7 
D)  35 
A)  17 
B)  18 
C)  2, 8, 7 
D)  35

Question 5

Much of what we know about subatomic particles comes from directly observing the interior of the atom.

Accepted Answer

A) True 
 B)False

Question 6

Which is a correct description of the organization of subatomic particles in atoms?

Accepted Answer

A)  Protons and electrons are tightly packed into a small nucleus. Neutrons occupy the space outside the nucleus. 
B)  Protons and neutrons are tightly packed into a small nucleus. Electrons occupy the space outside the nucleus. 
C)  Neutrons and electrons are tightly packed into a small nucleus. Protons occupy the space outside of the nucleus. 
D)  Electrons are tightly packed into a small nucleus. Protons and neutrons occupy the space outside of the nucleus. 
A)  Protons and electrons are tightly packed into a small nucleus. Neutrons occupy the space outside the nucleus. 
B)  Protons and neutrons are tightly packed into a small nucleus. Electrons occupy the space outside the nucleus. 
C)  Neutrons and electrons are tightly packed into a small nucleus. Protons occupy the space outside of the nucleus. 
D)  Electrons are tightly packed into a small nucleus. Protons and neutrons occupy the space outside of the nucleus.

Question 7

A carbon rod or metal strip inserted into a molten compound or a solution to carry the electric current is called an electrode.

Accepted Answer

A) True 
 B)False

Question 8

Deuterium is the common name for

Accepted Answer

A)  hydrogen-0. 
B)  hydrogen-1. 
C)  hydrogen-2. 
D)  hydrogen-3. 
A)  hydrogen-0. 
B)  hydrogen-1. 
C)  hydrogen-2. 
D)  hydrogen-3.

Question 9

When an electron in an excited atom "falls down" to a lower energy level, the excited atom emits a characteristic

Accepted Answer

A)  electron. 
B)  neutron. 
C)  photon. 
D)  proton. 
A)  electron. 
B)  neutron. 
C)  photon. 
D)  proton.

Question 10

A vertical column in the modern periodic table is called a

Accepted Answer

A)  period. 
B)  group. 
C)  branch. 
D)  valence. 
A)  period. 
B)  group. 
C)  branch. 
D)  valence.

Question 11

The positive particles had varying masses in Goldstein's experiments using a gas discharge tube with perforated cathodes.

Accepted Answer

A) True 
 B)False

Question 12

Which element is a transition metal?

Accepted Answer

A)  Mg 
B)  Cd 
C)  Ar 
D)  I 
A)  Mg 
B)  Cd 
C)  Ar 
D)  I

Question 13

With the discovery of isotopes, which postulate of Dalton's original atomic theory must be modified?

Accepted Answer

A)  Matter is made up of atoms. 
B)  Atoms combine with other atoms in whole number ratios to form compounds. 
C)  All atoms of the same element are the same. 
D)  In chemical reactions, the arrangement of atoms is changed. 
A)  Matter is made up of atoms. 
B)  Atoms combine with other atoms in whole number ratios to form compounds. 
C)  All atoms of the same element are the same. 
D)  In chemical reactions, the arrangement of atoms is changed.

Question 14

Nuclear physicists have discovered over 100 different particles that compose the nucleus of an atom. From a chemistry perspective, the nucleus is best described as being composed of

Accepted Answer

A)  protons and neutrons packed tightly into a very small volume. 
B)  protons and electrons packed tightly into a very small volume. 
C)  neutrons and electrons packed tightly into a very small volume. 
D)  protons, neutrons and electrons packed tightly into a very small volume. 
A)  protons and neutrons packed tightly into a very small volume. 
B)  protons and electrons packed tightly into a very small volume. 
C)  neutrons and electrons packed tightly into a very small volume. 
D)  protons, neutrons and electrons packed tightly into a very small volume.

Question 15

Elements in the same group have

Accepted Answer

A)  the same atomic number. 
B)  the same number of neutrons. 
C)  the same number of electrons. 
D)  the same number of valence electrons. 
A)  the same atomic number. 
B)  the same number of neutrons. 
C)  the same number of electrons. 
D)  the same number of valence electrons.

Question 16

The designations s, p, d, f designate

Accepted Answer

A)  different electron energy levels. 
B)  different electron orbitals within an energy level. 
C)  different types of electrons. 
D)  valence electrons. 
A)  different electron energy levels. 
B)  different electron orbitals within an energy level. 
C)  different types of electrons. 
D)  valence electrons.

Question 17

Elements at the bottom of Group 7A on the periodic table are much more reactive than elements at the top of the group.

Accepted Answer

A) True 
 B)False

Question 18

How many neutrons are in this isotope of tin?   Sn

Accepted Answer

A)  50 
B)  66 
C)  116 
D)  182 
A)  50 
B)  66 
C)  116 
D)  182

Question 19

If X can represent the chemical symbol of any element in the periodic table, then   X represents an isotope of

Accepted Answer

A)  calcium. 
B)  uranium. 
C)  niobium. 
D)  lead. 
A)  calcium. 
B)  uranium. 
C)  niobium. 
D)  lead.

Question 20

How many electrons are there in a Ca atom?

Accepted Answer

A)  20 
B)  40 
C)  21 
D)  60 
A)  20 
B)  40 
C)  21 
D)  60

Exam 3: Atomic Structure

Solar fuels such as hydrogen are being studied as sources of energy. All of the following statements about hydrogen as a fuel source are true EXCEPT

How many nucleons are in this isotope of tin? Sn

Carbon has ________ valence electrons.

Give the main shell configuration for chlorine.

Much of what we know about subatomic particles comes from directly observing the interior of the atom.

Which is a correct description of the organization of subatomic particles in atoms?

A carbon rod or metal strip inserted into a molten compound or a solution to carry the electric current is called an electrode.

Deuterium is the common name for

When an electron in an excited atom "falls down" to a lower energy level, the excited atom emits a characteristic

A vertical column in the modern periodic table is called a

The positive particles had varying masses in Goldstein's experiments using a gas discharge tube with perforated cathodes.

Which element is a transition metal?

With the discovery of isotopes, which postulate of Dalton's original atomic theory must be modified?

Nuclear physicists have discovered over 100 different particles that compose the nucleus of an atom. From a chemistry perspective, the nucleus is best described as being composed of

Elements in the same group have

The designations s, p, d, f designate

Elements at the bottom of Group 7A on the periodic table are much more reactive than elements at the top of the group.

How many neutrons are in this isotope of tin? Sn

If X can represent the chemical symbol of any element in the periodic table, then X represents an isotope of

How many electrons are there in a Ca atom?

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