Question 1

Which of these elements is chemically similar to potassium?

Accepted Answer

A)  calcium 
B)  arsenic 
C)  phosphorus 
D)  cerium 
E)  cesium 
A)  calcium 
B)  arsenic 
C)  phosphorus 
D)  cerium 
E)  cesium

Question 2

Common examples of diatomic molecules from Group 7A elements include

Accepted Answer

A)  fluorine, hydrogen, and nitrogen. 
B)  nitrogen, chlorine, and bromine. 
C)  chlorine, bromine, and iodine. 
D)  iodine, lead, and oxygen. 
A)  fluorine, hydrogen, and nitrogen. 
B)  nitrogen, chlorine, and bromine. 
C)  chlorine, bromine, and iodine. 
D)  iodine, lead, and oxygen.

Question 3

What is the term for the number of protons in the nucleus of each atom of an element? It also indicates the number of electrons in the atom.

Accepted Answer

A)  Isotope number 
B)  Mass number 
C)  Mass-to-charge ratio 
D)  Atomic number 
E)  Atomic mass units 
A)  Isotope number 
B)  Mass number 
C)  Mass-to-charge ratio 
D)  Atomic number 
E)  Atomic mass units

Question 4

The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is the empirical formula for hexane, C6H14?

Accepted Answer

A)  C12H28 
B)  C6H14 
C)  C3H7 
D)  CH2.3 
E)  C0.43H 
A)  C12H28 
B)  C6H14 
C)  C3H7 
D)  CH2.3 
E)  C0.43H

Question 6

What is the formula of hydrobromic acid?

Accepted Answer

A)  H2OBr 
B)  HBrO3 
C)  HBrO 
D)  HBr 
E)  HBr·2H2O 
A)  H2OBr 
B)  HBrO3 
C)  HBrO 
D)  HBr 
E)  HBr·2H2O

Question 7

Who is credited with discovering the atomic nucleus?

Accepted Answer

A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Chadwick 
E)  Rutherford 
A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Chadwick 
E)  Rutherford

Question 8

An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)

Accepted Answer

A)  15 p, 16 n, 15 e 
B)  16 p, 15 n, 16 e 
C)  16 p, 31 n, 16 e 
D)  32 p, 31 n, 32 e 
E)  16 p, 16 n, 15 e 
A)  15 p, 16 n, 15 e 
B)  16 p, 15 n, 16 e 
C)  16 p, 31 n, 16 e 
D)  32 p, 31 n, 32 e 
E)  16 p, 16 n, 15 e

Question 9

Determine the number of protons, electrons, and neutrons for the isotope gold-118. The symbol for gold is Au.

Accepted Answer

A)  118 protons, 118 electrons, 79 neutrons 
B)  79 protons, 79 electrons, 118 neutrons 
C)  79 protons, 79 electrons, 39 neutrons 
D)  118 protons, 118 electrons, 39 neutrons 
E)  79 protons, 39 electrons, 118 neutrons 
A)  118 protons, 118 electrons, 79 neutrons 
B)  79 protons, 79 electrons, 118 neutrons 
C)  79 protons, 79 electrons, 39 neutrons 
D)  118 protons, 118 electrons, 39 neutrons 
E)  79 protons, 39 electrons, 118 neutrons

Question 10

Select the correct number of protons (p), electrons (e), and neutrons (n) in one atom of chlorine-37.

Accepted Answer

A)  37 p, 37 e, 17 n 
B)  17 p, 17 e, 37 n 
C)  17 p, 17 e, 20 n 
D)  37 p, 17 e, 20 n 
E)  17 p, 37 e, 17 n 
A)  37 p, 37 e, 17 n 
B)  17 p, 17 e, 37 n 
C)  17 p, 17 e, 20 n 
D)  37 p, 17 e, 20 n 
E)  17 p, 37 e, 17 n

Question 11

________ is defined as a mass exactly equal to one-twelfth the mass of one carbon-12 atom.

Accepted Answer

One atomic mass unit
1 amu
1 a

Question 12

________ are electrons that are deflected away from negatively charged plates.

Accepted Answer

The answer of ________ are electrons that are deflected away...

Question 13

Which is the correct formula for copper(II) phosphate?

Accepted Answer

A)  Cu2PO4 
B)  Cu3(PO4)2 
C)  Cu2PO3 
D)  Cu(PO4)2 
E)  Cu(PO3)2 
A)  Cu2PO4 
B)  Cu3(PO4)2 
C)  Cu2PO3 
D)  Cu(PO4)2 
E)  Cu(PO3)2

Question 14

All neutral atoms of tin have 50 protons and 50 electrons.

Accepted Answer

A) True 
 B)False

Question 15

Polyatomic molecules contain

Accepted Answer

A)  two different types of atoms. 
B)  two of the same types of atoms. 
C)  only two atoms of the same or different type. 
D)  more than two atoms of the same or different type. 
A)  two different types of atoms. 
B)  two of the same types of atoms. 
C)  only two atoms of the same or different type. 
D)  more than two atoms of the same or different type.

Question 16

Which of the following is a type of radioactive radiation that consists of electrons and is deflected away from the negatively charged plate?

Accepted Answer

A)  α rays 
B)  β rays 
C)  γ rays 
D)  δ rays 
E)  ε rays 
A)  α rays 
B)  β rays 
C)  γ rays 
D)  δ rays 
E)  ε rays

Question 17

Which isotope is not possible?

Accepted Answer

A)    
B)    
C)    
D)    
E)  All of these isotopes are possible. 
A)    
B)    
C)    
D)    
E)  All of these isotopes are possible.

Question 18

Describe the difference between an empirical formula and a molecular formula.

Accepted Answer

An empirical formula is the simplest che

Question 19

The elements in Group 1A are called the ________.

Accepted Answer

The answer of The elements in Group 1A are called...

Question 20

The chemical formula for iron(II) nitrate is

Accepted Answer

A)  Fe2(NO3)3. 
B)  Ir(NO2)2. 
C)  Fe2N3. 
D)  Fe(NO3)2. 
E)  Fe(NO2)2. 
A)  Fe2(NO3)3. 
B)  Ir(NO2)2. 
C)  Fe2N3. 
D)  Fe(NO3)2. 
E)  Fe(NO2)2.

Exam 2: Atoms, Molecules, and Ions

Which of these elements is chemically similar to potassium?

Common examples of diatomic molecules from Group 7A elements include

What is the term for the number of protons in the nucleus of each atom of an element? It also indicates the number of electrons in the atom.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

Which of the following is the empirical formula for hexane, C6H14?

What is the formula of hydrobromic acid?

Who is credited with discovering the atomic nucleus?

An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)

Determine the number of protons, electrons, and neutrons for the isotope gold-118. The symbol for gold is Au.

Select the correct number of protons (p), electrons (e), and neutrons (n) in one atom of chlorine-37.

________ is defined as a mass exactly equal to one-twelfth the mass of one carbon-12 atom.

________ are electrons that are deflected away from negatively charged plates.

Which is the correct formula for copper(II) phosphate?

All neutral atoms of tin have 50 protons and 50 electrons.

Polyatomic molecules contain

Which of the following is a type of radioactive radiation that consists of electrons and is deflected away from the negatively charged plate?

Which isotope is not possible?

Describe the difference between an empirical formula and a molecular formula.

The elements in Group 1A are called the ________.

The chemical formula for iron(II) nitrate is

Chemistry: the Central Science

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

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Which of the following is the empirical formula for hexane, C₆H₁₄?