Question 1

How many protons (p) and neutrons (n) are in an atom of   Sr?

Accepted Answer

A)  38 p, 52 n 
B)  38 p, 90 n 
C)  52 p, 38 n 
D)  90 p, 38 n 
A)  38 p, 52 n 
B)  38 p, 90 n 
C)  52 p, 38 n 
D)  90 p, 38 n

Question 2

When forming an ion, fluorine, F, will ________ electron(s).

Accepted Answer

A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two 
A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two

Question 3

Identify the charges of protons, neutrons, and electrons.

Accepted Answer

A)  protons +1, neutrons 0, electrons -1 
B)  protons 0, neutrons -1, electrons +1 
C)  protons -1, neutrons 0, electrons +1 
D)  protons 0, neutrons +1, electrons -1 
E)  protons +1, neutrons -1, electrons 0 
A)  protons +1, neutrons 0, electrons -1 
B)  protons 0, neutrons -1, electrons +1 
C)  protons -1, neutrons 0, electrons +1 
D)  protons 0, neutrons +1, electrons -1 
E)  protons +1, neutrons -1, electrons 0

Question 4

Predict the charge that a calcium ion would have.

Accepted Answer

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

Question 5

Which of the following contains the fewest atoms? You shouldn't need to do a calculation here.

Accepted Answer

A)  4.0 g Li 
B)  4.0 g Na 
C)  4.0 g Rb 
D)  4.0 g K 
E)  4.0 g Ca 
A)  4.0 g Li 
B)  4.0 g Na 
C)  4.0 g Rb 
D)  4.0 g K 
E)  4.0 g Ca

Question 6

Identify the chemical symbol of element Q in   Q.

Accepted Answer

A)  Br 
B)  Hg 
C)  Pd 
D)  Se 
A)  Br 
B)  Hg 
C)  Pd 
D)  Se

Question 7

Which of the following is a transition element?

Accepted Answer

A)  Pd 
B)  Sn 
C)  K 
D)  U 
E)  Pr 
A)  Pd 
B)  Sn 
C)  K 
D)  U 
E)  Pr

Question 8

How many electrons does the Ca2+ ion possess?

Accepted Answer

A)  27 
B)  18 
C)  9 
D)  3 
E)  20 
A)  27 
B)  18 
C)  9 
D)  3 
E)  20

Question 9

Bromine has two naturally occurring isotopes, Br-79 and Br-81. The atomic mass of Br-79 is 78.9183 u with a percent abundance of 50.69% and the atomic mass of Br-81 is 80.9163 u. Calculate the atomic mass of bromine.

Accepted Answer

A)  80.91 u 
B)  78.92 u 
C)  79.90 u 
D)  80.92 u 
E)  80.03 u 
A)  80.91 u 
B)  78.92 u 
C)  79.90 u 
D)  80.92 u 
E)  80.03 u

Question 10

Match the following.
-carbon

Accepted Answer

A) Mg 
B) Fe 
C) Si 
D) K 
E) C 
A) Mg 
B) Fe 
C) Si 
D) K 
E) C

Question 11

What element is defined by the following information? p+ = 17 n° = 20 e- = 17

Accepted Answer

A)  calcium 
B)  rubidium 
C)  chlorine 
D)  neon 
E)  oxygen 
A)  calcium 
B)  rubidium 
C)  chlorine 
D)  neon 
E)  oxygen

Question 12

What mass (in kg) does 5.84 moles of titanium (Ti) have?

Accepted Answer

A)  0.352 kg 
B)  0.122 kg 
C)  0.820 kg 
D)  0.280 kg 
E)  0.632 kg 
A)  0.352 kg 
B)  0.122 kg 
C)  0.820 kg 
D)  0.280 kg 
E)  0.632 kg

Question 13

Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the following masses and natural abundances: 
Cr-50 49.9461 u 4.35%
Cr-52 51.9405 u 83.79%
Cr-53 52.9407 u 9.50%
Cr-54 53.9389 u 2.36%

Accepted Answer

A)  51.94 u 
B)  51.69 u 
C)  208.7 u 
D)  53.21 u 
E)  52.00 u 
A)  51.94 u 
B)  51.69 u 
C)  208.7 u 
D)  53.21 u 
E)  52.00 u

Question 14

Which of the following elements is classified as a semimetal?

Accepted Answer

A)  calcium 
B)  boron 
C)  fluorine 
D)  uranium 
A)  calcium 
B)  boron 
C)  fluorine 
D)  uranium

Question 15

Which of the following contains the most atoms? You shouldn't need to do a calculation here.

Accepted Answer

A)  10.0 g Ne 
B)  10.0 g He 
C)  10.0 g Ar 
D)  10.0 g Kr 
E)  10.0 g Mg 
A)  10.0 g Ne 
B)  10.0 g He 
C)  10.0 g Ar 
D)  10.0 g Kr 
E)  10.0 g Mg

Question 16

Which one of the following elements is a poor conductor of heat and electricity?

Accepted Answer

A)  copper 
B)  fluorine 
C)  iron 
D)  lead 
A)  copper 
B)  fluorine 
C)  iron 
D)  lead

Question 17

Which of the following statements is FALSE according to John Dalton's reformulated atomic theory?

Accepted Answer

A)  Each element is composed of destructible particles called atoms. 
B)  All atoms of a given element have the same mass as well as other properties. 
C)  Compounds are formed when atoms combine in simple, whole-number ratios. 
D)  Atoms composing one element cannot change into atoms of another element during a chemical reaction. 
E)  All atoms of a given element have the same physical and chemical properties. 
A)  Each element is composed of destructible particles called atoms. 
B)  All atoms of a given element have the same mass as well as other properties. 
C)  Compounds are formed when atoms combine in simple, whole-number ratios. 
D)  Atoms composing one element cannot change into atoms of another element during a chemical reaction. 
E)  All atoms of a given element have the same physical and chemical properties.

Question 18

Match the following.
-magnesium

Accepted Answer

A) Mg 
B) Fe 
C) Si 
D) K 
E) C 
A) Mg 
B) Fe 
C) Si 
D) K 
E) C

Question 19

Isotopes differ in the number of ________.

Accepted Answer

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

Question 20

How many neutrons are in arsenic-42?

Accepted Answer

A)  33 
B)  41 
C)  9 
D)  41.9 
E)  75 
A)  33 
B)  41 
C)  9 
D)  41.9 
E)  75

Exam 2: Atoms and Elements

How many protons (p) and neutrons (n) are in an atom of Sr?

When forming an ion, fluorine, F, will ________ electron(s).

Identify the charges of protons, neutrons, and electrons.

Predict the charge that a calcium ion would have.

Which of the following contains the fewest atoms? You shouldn't need to do a calculation here.

Identify the chemical symbol of element Q in Q.

Which of the following is a transition element?

How many electrons does the Ca2+ ion possess?

Bromine has two naturally occurring isotopes, Br-79 and Br-81. The atomic mass of Br-79 is 78.9183 u with a percent abundance of 50.69% and the atomic mass of Br-81 is 80.9163 u. Calculate the atomic mass of bromine.

Match the following. -carbon

What element is defined by the following information? p+ = 17 n° = 20 e- = 17

What mass (in kg) does 5.84 moles of titanium (Ti) have?

Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the following masses and natural abundances: Cr-50 49.9461 u 4.35% Cr-52 51.9405 u 83.79% Cr-53 52.9407 u 9.50% Cr-54 53.9389 u 2.36%

Which of the following elements is classified as a semimetal?

Which of the following contains the most atoms? You shouldn't need to do a calculation here.

Which one of the following elements is a poor conductor of heat and electricity?

Which of the following statements is FALSE according to John Dalton's reformulated atomic theory?

Match the following. -magnesium

Isotopes differ in the number of ________.

How many neutrons are in arsenic-42?

Units of Measurement for Physical and Chemical Change

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

How many electrons does the Ca²⁺ ion possess?

What element is defined by the following information? p⁺ = 17 n° = 20 e^- = 17