Question 1

Predict the charge of the most stable ion of sodium.

Accepted Answer

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

Question 2

Which of the following statement is FALSE?

Accepted Answer

A)  Elements are organized in order of increasing atomic number on the periodic table. 
B)  Elements located on the boundary between the metals and nonmetals are metalloids. 
C)  Similar elements are organized in the same period of the periodic table. 
D)  Nonmetals are organized on the upper-right side of the periodic table. 
E)  Elements on the left side and in the centre of the periodic table are metals. 
A)  Elements are organized in order of increasing atomic number on the periodic table. 
B)  Elements located on the boundary between the metals and nonmetals are metalloids. 
C)  Similar elements are organized in the same period of the periodic table. 
D)  Nonmetals are organized on the upper-right side of the periodic table. 
E)  Elements on the left side and in the centre of the periodic table are metals.

Question 3

Which of the following statements is TRUE?

Accepted Answer

A)  Similar elements are organized in the same period of the periodic table. 
B)  Generally, the charge on the cations of the main-group elements is equal to the group number. 
C)  Non-metals are organized on the upper-left side of the periodic table. 
D)  Elements on the right side and in the centre of the periodic table are non-metals. 
E)  Elements are organized in order of decreasing atomic number on the periodic table. 
A)  Similar elements are organized in the same period of the periodic table. 
B)  Generally, the charge on the cations of the main-group elements is equal to the group number. 
C)  Non-metals are organized on the upper-left side of the periodic table. 
D)  Elements on the right side and in the centre of the periodic table are non-metals. 
E)  Elements are organized in order of decreasing atomic number on the periodic table.

Question 4

What does "X" represent in the following symbol?   X

Accepted Answer

A)  mercury 
B)  chlorine 
C)  scandium 
D)  bromine 
E)  selenium 
A)  mercury 
B)  chlorine 
C)  scandium 
D)  bromine 
E)  selenium

Question 5

The mass number is equal to ________.

Accepted Answer

A)  the sum of the number of the electrons and protons 
B)  the sum of the number of the neutrons and electrons 
C)  the sum of the number of protons, neutrons, and electrons 
D)  the sum of the number of protons and neutrons 
A)  the sum of the number of the electrons and protons 
B)  the sum of the number of the neutrons and electrons 
C)  the sum of the number of protons, neutrons, and electrons 
D)  the sum of the number of protons and neutrons

Question 6

Predict the charge of the most stable ion of chlorine.

Accepted Answer

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

Question 7

What is the identity of element Q if the ion Q2+ contains 10 electrons?

Accepted Answer

A)  C 
B)  O 
C)  Ne 
D)  Mg 
A)  C 
B)  O 
C)  Ne 
D)  Mg

Question 8

Barium belongs to the ________ group of the periodic table.

Accepted Answer

A)  alkali metal 
B)  alkaline earth metal 
C)  halogen 
D)  noble gas 
A)  alkali metal 
B)  alkaline earth metal 
C)  halogen 
D)  noble gas

Question 9

How many electrons are in a neutral atom of bromine-81?

Accepted Answer

A)  1 
B)  35 
C)  36 
D)  81 
A)  1 
B)  35 
C)  36 
D)  81

Question 10

Calcium, a metal with 20 electrons, tends to lose two, forming a 2+ cation that has the same number of electrons as ________.

Accepted Answer

A)  Helium 
B)  Neon 
C)  Argon 
D)  Krypton 
E)  Xenon 
A)  Helium 
B)  Neon 
C)  Argon 
D)  Krypton 
E)  Xenon

Question 11

When forming an ion, oxygen, O, will normally ________ 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 12

An atom of 82Kr contains ________ neutrons.

Accepted Answer

A)  36 
B)  118 
C)  46 
D)  80 
E)  82 
A)  36 
B)  118 
C)  46 
D)  80 
E)  82

Question 13

Silver has an atomic mass of 107.868 u. The Ag-109 isotope (108.905 u) has an abundance of 48.161%. What is the atomic mass, in u, of the other isotope?

Accepted Answer

A)  106.905 u 
B)  106.908 u 
C)  106.903 u 
D)  106.911 u 
A)  106.905 u 
B)  106.908 u 
C)  106.903 u 
D)  106.911 u

Question 14

Predict the charge that an ion formed from bromine would have.

Accepted Answer

A)  1- 
B)  2+ 
C)  1+ 
D)  4+ 
E)  2- 
A)  1- 
B)  2+ 
C)  1+ 
D)  4+ 
E)  2-

Question 15

Calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following masses and natural abundances: 
Ga-69 68.9256 u 60.11%
Ga-71 70.9247 u 39.89%

Accepted Answer

A)  69.72 u 
B)  69.93 u 
C)  70.00 u 
D)  69.80 u 
E)  70.68 u 
A)  69.72 u 
B)  69.93 u 
C)  70.00 u 
D)  69.80 u 
E)  70.68 u

Question 16

What group of elements in the periodic table are the most unreactive and why?

Accepted Answer

The noble gases are the most u

Question 17

Rubidium, a metal with 37 electrons, tends to lose one, forming a 1+ cation that has the same number of electrons as ________.

Accepted Answer

A)  Helium 
B)  Neon 
C)  Argon 
D)  Krypton 
E)  Xenon 
A)  Helium 
B)  Neon 
C)  Argon 
D)  Krypton 
E)  Xenon

Question 18

What is the chemical symbol for copper?

Accepted Answer

A)  Co 
B)  Cr 
C)  Cu 
D)  C 
A)  Co 
B)  Cr 
C)  Cu 
D)  C

Question 19

How many atoms are in 1.00 kg of copper?

Accepted Answer

A)  3.83 × 1029 atoms 
B)  3.83 × 1022 atoms 
C)  15.74 atoms 
D)  2.61 × 10-23 atoms 
E)  9.48 × 1024 atoms 
A)  3.83 × 1029 atoms 
B)  3.83 × 1022 atoms 
C)  15.74 atoms 
D)  2.61 × 10-23 atoms 
E)  9.48 × 1024 atoms

Question 20

How many electrons are in the ion P3-?

Accepted Answer

A)  12 
B)  18 
C)  28 
D)  34 
A)  12 
B)  18 
C)  28 
D)  34

Exam 2: Atoms and Elements

Predict the charge of the most stable ion of sodium.

Which of the following statement is FALSE?

Which of the following statements is TRUE?

What does "X" represent in the following symbol? X

The mass number is equal to ________.

Predict the charge of the most stable ion of chlorine.

What is the identity of element Q if the ion Q2+ contains 10 electrons?

Barium belongs to the ________ group of the periodic table.

How many electrons are in a neutral atom of bromine-81?

Calcium, a metal with 20 electrons, tends to lose two, forming a 2+ cation that has the same number of electrons as ________.

When forming an ion, oxygen, O, will normally ________ electron(s).

An atom of 82Kr contains ________ neutrons.

Silver has an atomic mass of 107.868 u. The Ag-109 isotope (108.905 u) has an abundance of 48.161%. What is the atomic mass, in u, of the other isotope?

Predict the charge that an ion formed from bromine would have.

Calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following masses and natural abundances: Ga-69 68.9256 u 60.11% Ga-71 70.9247 u 39.89%

What group of elements in the periodic table are the most unreactive and why?

Rubidium, a metal with 37 electrons, tends to lose one, forming a 1+ cation that has the same number of electrons as ________.

What is the chemical symbol for copper?

How many atoms are in 1.00 kg of copper?

How many electrons are in the ion P3-?

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

What is the identity of element Q if the ion Q²⁺ contains 10 electrons?

An atom of ⁸²Kr contains ________ neutrons.

How many electrons are in the ion P^3-?