Question 1

Which has the highest molecular mass?

Accepted Answer

A)  Br2O
B)  IBr2
C)  CBr4
D)  Br2O8
E)  BrF5

Question 2

What is the charge on the iron ion in FeCl3?

Accepted Answer

A)  "-3"
B)  "+3"
C)  "-1"
D)  "+1"
E)  "0" B

Question 3

Rubidium has two naturally occurring isotopes,85Rb (84.912 amu) and 87Rb (86.909 amu) .Rubidium-85 is the more abundant isotope (72.17%) .Calculate the average atomic mass of Rb.

Accepted Answer

A)  86.91 amu
B)  85.47 amu
C)  85.91 amu
D)  86.35 amu
E)  86.00 amu B

Question 4

Which of the following is NOT a common ion?

Accepted Answer

A)  Rb+
B)  S2-
C)  Al3+
D)  I-
E)  Ba+

Question 5

What is the symbol for magnesium?

Accepted Answer

A)  M
B)  Mg
C)  Mn
D)  Mo
E)  Md

Question 6

What is the charge on the phosphorus atom when it forms an ionic compound with magnesium?

Accepted Answer

The answer of What is the charge on the phosphorus...

Question 7

Give an example of a halogen.

Accepted Answer

fluorine,chlorine,bromine,iodine,astatine; answers will vary.

Question 8

For each of the elements below,there are only two naturally occurring isotopes.Using the atomic masses on the periodic table,identify the pair in which the lighter isotope is the more abundant one.

Accepted Answer

A)  "6Li and 7Li"
B)  "79Br and 81Br"
C)  "10B and 11B"
D)  "121Sb and 123Sb"
E)  "50V and 51V"

Question 9

In one sentence,describe the picture of the atom that emerged from the Geiger-Marsden experiment.

Accepted Answer

The answer of In one sentence,describe the picture of the...

Question 10

A baseball has a diameter of approximately 7.4 cm (2.9 inches) ,whereas a carbon atom has a diameter of about 140 pm.How many times larger is the baseball than the carbon atom?

Accepted Answer

A)  5.3  ×	imes×  1012
B)  5.3  ×	imes×  1010
C)  5.3  ×	imes×  108
D)  5.3  ×	imes×  106
E)  5.3  ×	imes×  103

Question 11

What is the correct symbol for an  α\alphaα  particle?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 12

Give an example of an alkaline earth metal.

Accepted Answer

beryllium,magnesium,...

Question 13

What is the formula for the ionic compound formed when calcium and bromine combine?

Accepted Answer

A)  CBr
B)  CaBr2
C)  Ca2Br
D)  CaBrO
E)  CaB2

Question 14

Give an example of a metalloid (also known as a semimetal).

Accepted Answer

boron,silicon,german...

Question 15

The average atomic mass of silver is 107.868 amu.Silver has two naturally occurring isotopes, 107Ag (106.905 amu,51.839%) and 109Ag.What is the isotopic mass of 109Ag?

Accepted Answer

A)  109.11 amu
B)  108.89 amu
C)  108.52 amu
D)  108.91 amu
E)  108.48 amu

Question 16

Active metals often react with oxygen in air to form a protective surface film that prevents further reaction.Which one of the following formulas for a metal-oxygen combination is NOT correct?

Accepted Answer

A)  Al2O3
B)  Fe2O3
C)  Na2O
D)  MgO2
E)  MnO

Question 17

Give an example of a period 4 transition metal.

Accepted Answer

scandium,titanium,va...

Question 18

Who discovered neutrons?

Accepted Answer

A)  Henri Becquerel
B)  Robert Millikan
C)  Joseph John Thomson
D)  John Dalton
E)  James Chadwick

Question 19

According to the Big Bang theory,which statement about the origin of the elements is NOT correct?

Accepted Answer

A)  Initially,energy was transformed into electrons and other elementary particles.
B)  As the universe cooled,neutrons and protons were formed.
C)  Collisions of neutrons and protons produced deuterons,which then led to the formation of alpha particles.
D)  Nuclear fusion reactions in the interior of stars formed elements up to 56Fe.
E)  All nuclear reactions forming the elements required an input of energy.

Question 20

Sodium is best described as a __________

Accepted Answer

A)  metalloid.
B)  metal.
C)  transition metal.
D)  noble gas.
E)  nonmetal.

Exam 2: Atoms, ions, and Compounds

Which has the highest molecular mass?

Correct AnswerverifiedShow Answer

What is the charge on the iron ion in FeCl3?

Correct AnswerverifiedB

Rubidium has two naturally occurring isotopes,85Rb (84.912 amu) and 87Rb (86.909 amu) .Rubidium-85 is the more abundant isotope (72.17%) .Calculate the average atomic mass of Rb.

Correct AnswerverifiedB

Which of the following is NOT a common ion?

Correct AnswerverifiedShow Answer

What is the symbol for magnesium?

Correct AnswerverifiedShow Answer

What is the charge on the phosphorus atom when it forms an ionic compound with magnesium?

Correct AnswerverifiedShow Answer

Give an example of a halogen.

Correct Answerverifiedfluorine,chlorine,bromine,iodine,astatine; answers will vary.

For each of the elements below,there are only two naturally occurring isotopes.Using the atomic masses on the periodic table,identify the pair in which the lighter isotope is the more abundant one.

Correct AnswerverifiedShow Answer

In one sentence,describe the picture of the atom that emerged from the Geiger-Marsden experiment.

Correct AnswerverifiedShow Answer

A baseball has a diameter of approximately 7.4 cm (2.9 inches) ,whereas a carbon atom has a diameter of about 140 pm.How many times larger is the baseball than the carbon atom?

Correct AnswerverifiedShow Answer

What is the correct symbol for an α\alphaα particle?

Correct AnswerverifiedShow Answer

Give an example of an alkaline earth metal.

Correct Answerverifiedberyllium,magnesium,...View AnswerShow Answer

What is the formula for the ionic compound formed when calcium and bromine combine?

Correct AnswerverifiedShow Answer

Give an example of a metalloid (also known as a semimetal).

Correct Answerverifiedboron,silicon,german...View AnswerShow Answer

The average atomic mass of silver is 107.868 amu.Silver has two naturally occurring isotopes, 107Ag (106.905 amu,51.839%) and 109Ag.What is the isotopic mass of 109Ag?

Correct AnswerverifiedShow Answer

Active metals often react with oxygen in air to form a protective surface film that prevents further reaction.Which one of the following formulas for a metal-oxygen combination is NOT correct?

Correct AnswerverifiedShow Answer

Give an example of a period 4 transition metal.

Correct Answerverifiedscandium,titanium,va...View AnswerShow Answer

Who discovered neutrons?

Correct AnswerverifiedShow Answer

According to the Big Bang theory,which statement about the origin of the elements is NOT correct?

Correct AnswerverifiedShow Answer

Sodium is best described as a __________

Correct AnswerverifiedShow Answer

Correct Answer
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What is the charge on the iron ion in FeCl₃?

Correct Answer
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B

Rubidium has two naturally occurring isotopes,⁸⁵Rb (84.912 amu) and ⁸⁷Rb (86.909 amu) .Rubidium-85 is the more abundant isotope (72.17%) .Calculate the average atomic mass of Rb.

Correct Answer
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B

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fluorine,chlorine,bromine,iodine,astatine; answers will vary.

Correct Answer
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What is the correct symbol for an $\alpha$ particle?

Correct Answer
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beryllium,magnesium,...
View Answer

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Correct Answer
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boron,silicon,german...
View Answer

The average atomic mass of silver is 107.868 amu.Silver has two naturally occurring isotopes, ¹⁰⁷Ag (106.905 amu,51.839%) and ¹⁰⁹Ag.What is the isotopic mass of ¹⁰⁹Ag?

Correct Answer
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scandium,titanium,va...
View Answer

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