Question 1

Which of these elements is most likely to be a good conductor of electricity?

Accepted Answer

A)   N
B)   S
C)   He
D)   Cl
E)   FeF) C) and D)
G) A) and B)

Question 2

Determine the average atomic mass of boron. The natural abundance of 10B (weighing 10.0129 amu) is 19.9% and the natural abundance of 11B (weighing 11.0093 amu) is 80.1%. Show all your work.

Accepted Answer

(10.0129 amu)(0.199)...

Question 3

________ have properties that are intermediate between those of metals and nonmetals.

Accepted Answer

The answer of ________ have properties that are intermediate between...

Question 4

An anion is defined as

Accepted Answer

A)   an atom or group of atoms with a net negative charge.
B)   a stable atom.
C)   a group of stable atoms.
D)   an atom or group of atoms with a net positive charge.
E)   neutral.F) C) and D)
G) A) and D)

Question 5

Which of these materials are typically poor conductors of heat and electricity?

Accepted Answer

A)   Metals
B)   Metalloids
C)   Nonmetals
D)   Alkaline earth metals
E)   Alkali metalsF) A) and E)
G) A) and D)

Question 6

The elements in Group 8A are called the ________.

Accepted Answer

The answer of The elements in Group 8A are called...

Question 7

When J. J. Thomson discovered the electron, what physical property of the electron did he measure?

Accepted Answer

A)   its charge, e
B)   its charge-to-mass ratio, e/m
C)   its temperature, T
D)   its mass, m
E)   its atomic number, ZF) C) and D)
G) A) and E)

Question 8

C(graphite)  and C(diamond)  are examples of

Accepted Answer

A)   isotopes of carbon.
B)   allotropes of carbon.
C)   the law of definite proportions.
D)   different carbon ions.E) A) and C)
F) A) and B)

Question 9

Determine the number of protons and identify the correct symbol for an atom with 20 neutrons and 20 electrons.

Accepted Answer

A)   20 protons, 
B)   20 protons, 
C)   20 protons, 
D)   40 protons, 
E)   40 protons, F) B) and C)
G) A) and B)

Question 10

Which of the following is a type of radioactive radiation that has no charge and is unaffected by external electric or magnetic fields?

Accepted Answer

A)   α rays
B)   β rays
C)   γ rays
D)   δ rays
E)   ε raysF) C) and D)
G) B) and D)

Question 11

The elements in Group 8A are called the ________.

Accepted Answer

The answer of The elements in Group 8A are called...

Question 12

Almost all the mass of an atom is concentrated in the nucleus.

Accepted Answer

A) True 
 B)False

Question 13

The chemical name for ClO3- is "chlorate ion". What is the common name for HClO3?

Accepted Answer

A)   hydrochloric acid
B)   chloroform
C)   hydrogen trioxychloride
D)   chlorous acid
E)   chloric acidF) A) and C)
G) B) and D)

Question 14

Which one of the following formulas of ionic compounds is the least likely to be correct?

Accepted Answer

A)   NH4Cl
B)   Ba(OH) 2
C)   Na2SO4
D)   Ca2NO3
E)   Cu(CN) 2F) A) and B)
G) A) and C)

Question 15

The 80Br- ion has

Accepted Answer

A)   45 protons, 35 neutrons, 45 electrons.
B)   35 protons, 45 neutrons, 34 electrons.
C)   35 protons, 45 neutrons, 36 electrons.
D)   45 protons, 35 neutrons, 46 electrons.
E)   35 protons, 45 neutrons, 46 electrons.F) C) and E)
G) C) and D)

Question 16

Who discovered the neutron, the subatomic particle having a neutral charge?

Accepted Answer

A)   Millikan
B)   Dalton
C)   Chadwick
D)   Rutherford
E)   ThomsonF) All of the above
G) A) and B)

Question 17

What is the formula of iodous acid?

Accepted Answer

A)   HI
B)   HIO3
C)   HIO
D)   HIO4
E)   HIO2F) A) and D)
G) A) and C)

Question 18

What is the name given for the elements in Group 7A in the periodic table?

Accepted Answer

The answer of What is the name given for the...

Question 19

The elements in Group 2A are known by what name?

Accepted Answer

A)   Transition metals
B)   Halogens
C)   Alkali metals
D)   Alkaline earth metals
E)   Noble gasesF) A) and D)
G) A) and B)

Question 20

What is the chemical name of FeSO3?

Accepted Answer

A)   Iron(II)  sulfite
B)   Iron(III)  sulfate
C)   Iron sulfate
D)   Iron sulfur trioxide
E)   None of the above names is correct.F) A) and B)
G) A) and E)

Exam 2: Atoms, Molecules, and Ions

Determine the average atomic mass of boron. The natural abundance of 10B (weighing 10.0129 amu) is 19.9% and the natural abundance of 11B (weighing 11.0093 amu) is 80.1%. Show all your work.

Correct Answerverified(10.0129 amu)(0.199)...View AnswerShow Answer

The elements in Group 8A are called the ________.

Correct AnswerverifiedShow Answer

What is the chemical name of FeSO3?

Correct AnswerverifiedShow Answer

When J. J. Thomson discovered the electron, what physical property of the electron did he measure?

Correct AnswerverifiedShow Answer

The 80Br- ion has

Correct AnswerverifiedShow Answer

The chemical name for ClO3- is "chlorate ion". What is the common name for HClO3?

Correct AnswerverifiedShow Answer

Who discovered the neutron, the subatomic particle having a neutral charge?

Correct AnswerverifiedShow Answer

What is the formula of iodous acid?

Correct AnswerverifiedShow Answer

The elements in Group 2A are known by what name?

Correct AnswerverifiedShow Answer

Almost all the mass of an atom is concentrated in the nucleus.

Correct AnswerverifiedShow Answer

The elements in Group 8A are called the ________.

Correct AnswerverifiedShow Answer

Determine the number of protons and identify the correct symbol for an atom with 20 neutrons and 20 electrons.

Correct AnswerverifiedShow Answer

Which of the following is a type of radioactive radiation that has no charge and is unaffected by external electric or magnetic fields?

Correct AnswerverifiedShow Answer

What is the name given for the elements in Group 7A in the periodic table?

Correct AnswerverifiedShow Answer

C(graphite) and C(diamond) are examples of

Correct AnswerverifiedShow Answer

Which of these elements is most likely to be a good conductor of electricity?

Correct AnswerverifiedShow Answer

An anion is defined as

Correct AnswerverifiedShow Answer

________ have properties that are intermediate between those of metals and nonmetals.

Correct AnswerverifiedShow Answer

Which of these materials are typically poor conductors of heat and electricity?

Correct AnswerverifiedShow Answer

Which one of the following formulas of ionic compounds is the least likely to be correct?

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Determine the average atomic mass of boron. The natural abundance of ¹⁰B (weighing 10.0129 amu) is 19.9% and the natural abundance of ¹¹B (weighing 11.0093 amu) is 80.1%. Show all your work.

Correct Answer
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(10.0129 amu)(0.199)...
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What is the chemical name of FeSO₃?

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The ⁸⁰Br^- ion has

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The chemical name for ClO₃^- is "chlorate ion". What is the common name for HClO₃?

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