Question 1

________ 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 2

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 unitsF) A) and C)
G) A) and E)

Question 3

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 nF) A) and E)
G) A) and C)

Question 4

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.E) A) and B)
F) All of the above

Question 5

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

Accepted Answer

An empirical formula is the simplest che...

Question 6

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.F) C) and D)
G) A) and E)

Question 7

The elements in Group 1A are called the ________.

Accepted Answer

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

Question 8

What is the formula of hydrobromic acid?

Accepted Answer

A)   H2OBr
B)   HBrO3
C)   HBrO
D)   HBr
E)   HBr·2H2OF) All of the above
G) D) and E)

Question 9

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

Accepted Answer

A)   C12H28
B)   C6H14
C)   C3H7
D)   CH2.3
E)   C0.43HF) B) and E)
G) A) and B)

Question 10

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 neutronsF) C) and D)
G) C) and E)

Question 11

Who is credited with discovering the atomic nucleus?

Accepted Answer

A)   Dalton
B)   Gay-Lussac
C)   Thomson
D)   Chadwick
E)   RutherfordF) A) and D)
G) C) and E)

Question 12

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 raysF) D) and E)
G) B) and D)

Question 13

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 14

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 eF) B) and E)
G) D) and E)

Question 15

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) 2F) A) and D)
G) A) and C)

Question 16

Which of these elements is chemically similar to potassium?

Accepted Answer

A)   calcium
B)   arsenic
C)   phosphorus
D)   cerium
E)   cesiumF) A) and D)
G) A) and C)

Question 17

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

Accepted Answer

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

Question 18

Which isotope is not possible?

Accepted Answer

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

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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.E) A) and C)
F) C) and D)

Exam 2: Atoms, Molecules, and Ions

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

Correct AnswerverifiedShow Answer

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

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Which isotope is not possible?

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Polyatomic molecules contain

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

Correct AnswerverifiedAn empirical formula is the simplest che...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

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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.

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Which of these elements is chemically similar to potassium?

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

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Who is credited with discovering the atomic nucleus?

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Common examples of diatomic molecules from Group 7A elements include

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The elements in Group 1A are called the ________.

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

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What is the formula of hydrobromic acid?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The chemical formula for iron(II) nitrate is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedOne atomic mass unit1 amu1 a...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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An empirical formula is the simplest che...
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Which of the following is the empirical formula for hexane, C₆H₁₄?

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One atomic mass unit
1 amu
1 a...
View Answer

Correct Answer
verified