Question 1

An atom of 131I contains ________ neutrons.

Accepted Answer

A)  53 
B)  184 
C)  78 
D)  124 
E)  131 
A)  53 
B)  184 
C)  78 
D)  124 
E)  131

Question 2

Predict the charge that an aluminum ion would have.

Accepted Answer

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

Question 3

How many moles are in 2.16 × 1024 atoms of magnesium?

Accepted Answer

A)  35.9 moles 
B)  3.59 moles 
C)  0.359 moles 
D)  7.18 moles 
E)  0.90 moles 
A)  35.9 moles 
B)  3.59 moles 
C)  0.359 moles 
D)  7.18 moles 
E)  0.90 moles

Question 4

Which of the following elements is a liquid at room temperature?

Accepted Answer

A)  radon 
B)  boron 
C)  mercury 
D)  lithium 
E)  calcium 
A)  radon 
B)  boron 
C)  mercury 
D)  lithium 
E)  calcium

Question 5

Gallium has an atomic mass of 69.723 amu.The Ga-69 (68.926 amu)is 60.11%.What is the amu of the other isotope?

Accepted Answer

A)  70.924 amu 
B)  70.928 amu 
C)  70.932 amu 
D)  70.920 amu 
A)  70.924 amu 
B)  70.928 amu 
C)  70.932 amu 
D)  70.920 amu

Question 6

How many atoms are in 7.50 moles of Ca?

Accepted Answer

A)  4.52 × 1024 atoms 
B)  1.52 × 1024 atoms 
C)  5.02 × 1023 atoms 
D)  3.01 × 1024 atoms 
E)  7.53 × 1023 atoms 
A)  4.52 × 1024 atoms 
B)  1.52 × 1024 atoms 
C)  5.02 × 1023 atoms 
D)  3.01 × 1024 atoms 
E)  7.53 × 1023 atoms

Question 7

The mass number of an atom of 79Br is ________.

Accepted Answer

A)  35 
B)  114 
C)  44 
D)  79 
E)  72 
A)  35 
B)  114 
C)  44 
D)  79 
E)  72

Question 8

How many electrons does the Se2- ion possess?

Accepted Answer

A)  32 
B)  36 
C)  4 
D)  0 
E)  34 
A)  32 
B)  36 
C)  4 
D)  0 
E)  34

Question 9

Which of the following does NOT describe a metal?

Accepted Answer

A)  good conductor of heat 
B)  good conductor of electricity 
C)  tends to gain electrons 
D)  forms ionic compounds with nonmetals 
E)  found on the left side of the periodic table 
A)  good conductor of heat 
B)  good conductor of electricity 
C)  tends to gain electrons 
D)  forms ionic compounds with nonmetals 
E)  found on the left side of the periodic table

Question 10

Calculate the mass (in g)of 2.1 × 1024 atoms of W.

Accepted Answer

A)  3.9 × 102 g 
B)  2.4 × 102 g 
C)  3.2 × 102 g 
D)  1.5 × 102 g 
E)  6.4 × 102 g 
A)  3.9 × 102 g 
B)  2.4 × 102 g 
C)  3.2 × 102 g 
D)  1.5 × 102 g 
E)  6.4 × 102 g

Question 11

Which of the following elements is a nonmetal?

Accepted Answer

A)  Pu 
B)  C 
C)  Br 
D)  K 
E)  Be 
A)  Pu 
B)  C 
C)  Br 
D)  K 
E)  Be

Question 12

What is the identity of element Q if the ion Q2+ contains 36 electrons?

Accepted Answer

A)  Ge 
B)  Se 
C)  Kr 
D)  Sr 
A)  Ge 
B)  Se 
C)  Kr 
D)  Sr

Question 13

Which of the following elements is a halogen?

Accepted Answer

A)  Po 
B)  S 
C)  I 
D)  Sn 
E)  Kr 
A)  Po 
B)  S 
C)  I 
D)  Sn 
E)  Kr

Question 14

Identify the equipment that Thomson utilized to do his research.

Accepted Answer

A)  cathode ray tube 
B)  light bulb 
C)  oscilloscope 
D)  oil atomizer, light source, microscope 
E)  electromagnetic field generator 
A)  cathode ray tube 
B)  light bulb 
C)  oscilloscope 
D)  oil atomizer, light source, microscope 
E)  electromagnetic field generator

Question 15

Which of the following does NOT contain the same number of atoms as 3.30 moles of K?

Accepted Answer

A)  3.30 moles of K 
B)  1.50 moles of Hf 
C)  3.30 moles of Os 
D)  3.30 moles of Co 
E)  3.30 moles of Au 
A)  3.30 moles of K 
B)  1.50 moles of Hf 
C)  3.30 moles of Os 
D)  3.30 moles of Co 
E)  3.30 moles of Au

Question 16

Which of the following elements is NOT a metal?

Accepted Answer

A)  Mg 
B)  Na 
C)  He 
D)  Au 
E)  Mn 
A)  Mg 
B)  Na 
C)  He 
D)  Au 
E)  Mn

Question 17

The atomic number of an atom of 130Xe is

Accepted Answer

A)  184. 
B)  54. 
C)  76. 
D)  122. 
E)  130. 
A)  184. 
B)  54. 
C)  76. 
D)  122. 
E)  130.

Question 18

Identify the green-yellowish gas that is used as a disinfecting agent.

Accepted Answer

A)  chlorine 
B)  bromine 
C)  iodine 
D)  fluorine 
A)  chlorine 
B)  bromine 
C)  iodine 
D)  fluorine

Question 19

Calculate the atomic mass of element "X",if it has 2 naturally occurring isotopes with the following masses and natural abundances: X-45 44.8776 amu 32.88%
X-47 46.9443 amu 67.12%

Accepted Answer

A)  46.26 amu 
B)  45.91 amu 
C)  46.34 amu 
D)  46.84 amu 
E)  44.99 amu 
A)  46.26 amu 
B)  45.91 amu 
C)  46.34 amu 
D)  46.84 amu 
E)  44.99 amu

Question 20

Identify the instrument that is used to determine the mass of a molecule.

Accepted Answer

A)  mass spectrometer 
B)  nuclear magnetic resonance spectrometer 
C)  infrared spectrometer 
D)  gas chromatograph 
E)  ultraviolet spectrophotometer 
A)  mass spectrometer 
B)  nuclear magnetic resonance spectrometer 
C)  infrared spectrometer 
D)  gas chromatograph 
E)  ultraviolet spectrophotometer

Exam 2: Atoms and Elements

An atom of 131I contains ________ neutrons.

Predict the charge that an aluminum ion would have.

How many moles are in 2.16 × 1024 atoms of magnesium?

Which of the following elements is a liquid at room temperature?

Gallium has an atomic mass of 69.723 amu.The Ga-69 (68.926 amu)is 60.11%.What is the amu of the other isotope?

How many atoms are in 7.50 moles of Ca?

The mass number of an atom of 79Br is ________.

How many electrons does the Se2- ion possess?

Which of the following does NOT describe a metal?

Calculate the mass (in g)of 2.1 × 1024 atoms of W.

Which of the following elements is a nonmetal?

What is the identity of element Q if the ion Q2+ contains 36 electrons?

Which of the following elements is a halogen?

Identify the equipment that Thomson utilized to do his research.

Which of the following does NOT contain the same number of atoms as 3.30 moles of K?

Which of the following elements is NOT a metal?

The atomic number of an atom of 130Xe is

Identify the green-yellowish gas that is used as a disinfecting agent.

Calculate the atomic mass of element "X",if it has 2 naturally occurring isotopes with the following masses and natural abundances: X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%

Identify the instrument that is used to determine the mass of a molecule.

Matter, measurement, and Problem Solving

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

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,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

An atom of 131_{I contains ________ neutrons.}

How many moles are in 2.16 × 10²⁴ atoms of magnesium?

The mass number of an atom of ⁷⁹Br is ________.

How many electrons does the Se^2- ion possess?

Calculate the mass (in g)of 2.1 × 10²⁴ atoms of W.

What is the identity of element Q if the ion Q²⁺ contains 36 electrons?

The atomic number of an atom of ¹³⁰Xe is