Question 1

Which one of the following is not true concerning cathode rays?

Accepted Answer

A)  They originate from the negative electrode.
B)  They travel in straight lines in the absence of electric or magnetic fields.
C)  They impart a negative charge to metals exposed to them.
D)  They are made up of electrons.
E)  The characteristics of cathode rays depend on the material from which they are emitted.

Question 2

What is the molecular formula for nonane?

Accepted Answer

A)  C9H18
B)  C9H20
C)  C10H20
D)  C10H22
E)  C10H24

Question 3

Different isotopes of a particular element contain different numbers of __________.

Accepted Answer

A)  protons
B)  neutrons
C)  protons and neutrons
D)  protons, neutrons, and electrons
E)  None of the above is correct.

Question 4

Elements in Group 2A are known as the __________.

Accepted Answer

A)  alkaline earth metals
B)  alkali metals
C)  chalcogens
D)  halogens
E)  noble gases

Question 5

The correct name for N2O5 is __________.

Accepted Answer

A)  nitrous oxide
B)  nitrogen pentoxide
C)  dinitrogen pentoxide
D)  nitric oxide
E)  nitrogen oxide

Question 6

All atoms of a given element have the same __________.

Accepted Answer

A)  mass
B)  number of protons
C)  number of neutrons
D)  number of electrons and neutrons
E)  density

Question 7

Of the three types of radioactivity characterized by Rutherford, which is/are electrically charged?

Accepted Answer

A)  β-rays
B)  α-rays and β-rays
C)  α-rays, β-rays, and γ-rays
D)  α-rays
E)  α-rays and γ-rays

Question 8

Barium forms an ion with a charge of __________.

Accepted Answer

A)  1+
B)  2-
C)  3+
D)  3-
E)  2+

Question 9

Isotopes are atoms that have the same number of __________ but differing number of __________.

Accepted Answer

A)  protons, electrons
B)  neutrons, protons
C)  protons, neutrons
D)  electrons, protons
E)  neutrons, electrons

Question 10

The charge on the iron ion in the salt Fe2O3 is __________.

Accepted Answer

A)  +1
B)  +2
C)  +3
D)  -5
E)  -6

Question 11

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

Accepted Answer

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

Question 12

Predict the empirical formula of the ionic compound that forms from magnesium and fluorine.

Accepted Answer

A)  Mg2F3
B)  MgF
C)  Mg2F
D)  Mg3F2
E)  MgF2

Question 13

The charge on an electron was determined in the __________.

Accepted Answer

A)  cathode ray tube, by J. J. Thompson
B)  Rutherford gold foil experiment
C)  Millikan oil drop experiment
D)  Dalton atomic theory
E)  atomic theory of matter

Question 14

Elements __________ exhibit similar physical and chemical properties.

Accepted Answer

A)  with similar chemical symbols
B)  with similar atomic masses
C)  in the same period of the periodic table
D)  on opposite sides of the periodic table
E)  in the same group of the periodic table

Question 15

When a fluorine atom forms the fluoride ion, it has the same charge as the __________ ion.

Accepted Answer

A)  sulfide
B)  ammonium
C)  nitrate
D)  phosphate
E)  sulfite

Question 16

The species __________ contains 16 neutrons.

Accepted Answer

A)  "31P"
B)  "34S2-"
C)  "36Cl"
D)  "80Br-"
E)  "16O"

Question 17

An atom of 131Xe contains __________ electrons.

Accepted Answer

A)  131
B)  185
C)  77
D)  123
E)  54

Question 18

Which element forms an ion with the same charge as the sulfate ion?

Accepted Answer

A)  magnesium
B)  copper
C)  iron
D)  phosphorus
E)  oxygen

Question 19

The nucleus of an atom does not contain __________.

Accepted Answer

A)  protons
B)  protons or neutrons
C)  neutrons
D)  subatomic particles
E)  electrons

Question 20

The charge on the manganese in the salt MnF3 is __________.

Accepted Answer

A)  1+
B)  1-
C)  2+
D)  2-
E)  3+

Exam 2: Atoms, Molecules, and Ions

The charge on the iron ion in the salt Fe2O3 is __________.

Correct AnswerverifiedShow Answer

Isotopes are atoms that have the same number of __________ but differing number of __________.

Correct AnswerverifiedShow Answer

Predict the empirical formula of the ionic compound that forms from magnesium and fluorine.

Correct AnswerverifiedShow Answer

The charge on an electron was determined in the __________.

Correct AnswerverifiedShow Answer

What is the molecular formula for nonane?

Correct AnswerverifiedShow Answer

Elements in Group 2A are known as the __________.

Correct AnswerverifiedShow Answer

Different isotopes of a particular element contain different numbers of __________.

Correct AnswerverifiedShow Answer

The nucleus of an atom does not contain __________.

Correct AnswerverifiedShow Answer

The species __________ contains 16 neutrons.

Correct AnswerverifiedShow Answer

All atoms of a given element have the same __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Elements __________ exhibit similar physical and chemical properties.

Correct AnswerverifiedShow Answer

Of the three types of radioactivity characterized by Rutherford, which is/are electrically charged?

Correct AnswerverifiedShow Answer

When a fluorine atom forms the fluoride ion, it has the same charge as the __________ ion.

Correct AnswerverifiedShow Answer

The correct name for N2O5 is __________.

Correct AnswerverifiedShow Answer

An atom of 131Xe contains __________ electrons.

Correct AnswerverifiedShow Answer

The charge on the manganese in the salt MnF3 is __________.

Correct AnswerverifiedShow Answer

Which one of the following is not true concerning cathode rays?

Correct AnswerverifiedShow Answer

Barium forms an ion with a charge of __________.

Correct AnswerverifiedShow Answer

Which element forms an ion with the same charge as the sulfate ion?

Correct AnswerverifiedShow Answer

The charge on the iron ion in the salt Fe₂O₃ is __________.

Correct Answer
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Isotopes are atoms that have the same number of but differing number of .

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

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The correct name for N₂O₅ is __________.

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An atom of ¹³¹Xe contains __________ electrons.

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The charge on the manganese in the salt MnF₃ is __________.

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