Question 1

The chemical name for SO32- (aq)  is sulfite ion. Therefore, the chemical name of H2SO3 (aq)  is

Accepted Answer

A)   dihydrosulfuric acid.
B)   sulfurous acid.
C)   dihydrogen sulfite.
D)   hyposulfurous acid.
E)   sulfuric acid.F) A) and E)
G) C) and D)

Question 2

Rutherford's experiment with alpha particle scattering by gold foil established that

Accepted Answer

A)   positive charge not evenly distributed throughout an atom.
B)   electrons have a negative charge.
C)   electrons have a positive charge.
D)   atoms are made of protons, neutrons, and electrons.
E)   protons are 1840 times heavier than electrons.F) B) and D)
G) B) and C)

Question 3

Millikan's oil-drop experiment

Accepted Answer

A)   established the charge on an electron.
B)   showed that all oil drops carried the same charge.
C)   provided support for the nuclear model of the atom.
D)   suggested that some oil drops carried fractional numbers of electrons.
E)   suggested the presence of a neutral particle in the atom.F) B) and D)
G) A) and E)

Question 4

Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials. What is its formula?

Accepted Answer

A)   KMnO3
B)   KMnO4
C)   K2MnO4
D)   K(MnO4) 2
E)   K2Mn2O7F) A) and E)
G) C) and E)

Question 5

What binary compound would be formed from barium ions and fluoride ions?

Accepted Answer

A)   Ba2F3
B)   BaF3
C)   BaF
D)   Ba2F
E)   BaF2F) A) and D)
G) B) and E)

Question 6

Which of these elements is chemically similar to oxygen?

Accepted Answer

A)   Sulfur
B)   Calcium
C)   Iron
D)   Nickel
E)   PotassiumF) C) and D)
G) A) and D)

Question 7

Tetrasulfur dinitride decomposes explosively when heated. What is its formula?

Accepted Answer

A)   S2N4
B)   S4N2
C)   4SN2
D)   S4N
E)   S2NF) A) and D)
G) B) and C)

Question 8

Which of these compounds is most likely to be ionic?

Accepted Answer

A)   GaAs
B)   SrBr2
C)   NO2
D)   CBr4
E)   H2OF) B) and E)
G) C) and E)

Question 9

Lead (Pb) is a main group element.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is a molecular formula for a compound with an empirical formula of CH?

Accepted Answer

A)   C2H6
B)   C3H9
C)   C4H10
D)   C6H6
E)   None of the answers is correct.F) A) and B)
G) C) and D)

Question 11

What is the formula for the ionic compound formed by calcium ions and nitrate ions?

Accepted Answer

A)   Ca3N2
B)   Ca(NO3) 2
C)   Ca2NO3
D)   Ca2NO2
E)   CaNO3F) C) and E)
G) A) and E)

Question 12

Who is credited with measuring the mass/charge ratio of the electron?

Accepted Answer

A)   Dalton
B)   Chadwick
C)   Thomson
D)   Millikan
E)   RutherfordF) A) and E)
G) None of the above

Question 13

Which of the following is a nonmetal?

Accepted Answer

A)   Lithium, Li, Z = 3
B)   Bromine, Br, Z = 35
C)   Mercury, Hg, Z = 80
D)   Bismuth, Bi, Z = 83
E)   Sodium, Na, Z = 11F) A) and E)
G) None of the above

Question 14

The formula for sodium sulfide is

Accepted Answer

A)   NaS.
B)   K2S.
C)   NaS2.
D)   Na2S.
E)   SeS.F) B) and E)
G) B) and C)

Question 15

Atoms X, Y, Z, and R have the following nuclear compositions:  Which of the following are isotopes of the same element?

Accepted Answer

A)   I & II
B)   I & IV
C)   II & IV
D)   III & IV
E)   I & IIIF) A) and B)
G) A) and C)

Question 16

The empirical formula of C6H6 is CH.

Accepted Answer

A) True 
 B)False

Question 17

The molecular formula of a molecular substance is a whole number multiple of its empirical formula.

Accepted Answer

A) True 
 B)False

Question 18

Determine the number of electrons and identify the correct symbol for an atom with 17 protons and 18 neutrons.

Accepted Answer

A)   17 electrons, 
B)   18 electrons, 
C)   17 electrons, 
D)   17 electrons, 
E)   18 electrons, F) C) and D)
G) B) and D)

Question 19

What is the formula for the ionic compound formed by calcium and selenium?

Accepted Answer

A)   CaSe
B)   Ca2Se
C)   CaSe2
D)   Ca3Se
E)   CaSe3F) A) and B)
G) C) and D)

Question 20

The elements in Group 7A are known by what name?

Accepted Answer

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

Exam 2: Atoms, Molecules, and Ions

Lead (Pb) is a main group element.

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Atoms X, Y, Z, and R have the following nuclear compositions: Which of the following are isotopes of the same element?

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What is the formula for the ionic compound formed by calcium ions and nitrate ions?

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Tetrasulfur dinitride decomposes explosively when heated. What is its formula?

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The elements in Group 7A are known by what name?

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The empirical formula of C6H6 is CH.

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The molecular formula of a molecular substance is a whole number multiple of its empirical formula.

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Which of these compounds is most likely to be ionic?

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Which of the following is a molecular formula for a compound with an empirical formula of CH?

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The formula for sodium sulfide is

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What binary compound would be formed from barium ions and fluoride ions?

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Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials. What is its formula?

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What is the formula for the ionic compound formed by calcium and selenium?

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Millikan's oil-drop experiment

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Which of the following is a nonmetal?

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Determine the number of electrons and identify the correct symbol for an atom with 17 protons and 18 neutrons.

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Rutherford's experiment with alpha particle scattering by gold foil established that

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Who is credited with measuring the mass/charge ratio of the electron?

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The chemical name for SO32- (aq) is sulfite ion. Therefore, the chemical name of H2SO3 (aq) is

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Which of these elements is chemically similar to oxygen?

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The empirical formula of C₆H₆ is CH.

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The chemical name for SO₃^2- (aq) is sulfite ion. Therefore, the chemical name of H₂SO₃ (aq) is

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