Question 1

According to the octet rule, strontium (Sr)  will form which of the following monoatomic ions?

Accepted Answer

A)   Sr2- 
B)   Sr3+
C)   Sr2+
D)   Sr3-E) All of the above
F) A) and D)

Question 2

Give the name for each of the following:
a) N2Br4
b) NH4Cl
c) Fe(NO3)3
d) NaF

Accepted Answer

a) dinitrogen tetrab...

Question 3

Ethanol, C2H5OH, is found in alcoholic beverages. If a 125-g sample is pure ethanol, how many moles of ethanol are present?

Accepted Answer

A)   0.419 moles
B)   2.72 moles
C)   5750 moles
D)   46.3 molesE) A) and B)
F) A) and C)

Question 4

What is the formula of beryllium sulfide?

Accepted Answer

A)   BeS
B)   Be2S
C)   Be2S3
D)   Be3S2E) A) and D)
F) A) and C)

Question 5

Which pair of elements cannot combine to form a chemical compound?

Accepted Answer

A)   Na and Ne
B)   Li and O
C)   Fe and S
D)   Ca and IE) C) and D)
F) B) and D)

Question 6

The oxygen gas found in the atmosphere contains ___ atom(s) per molecule.

Accepted Answer

The answer of The oxygen gas found in the atmosphere...

Question 7

The difference between an ionic bond and a covalent bond is that

Accepted Answer

A)   ionic bonds commonly occur between two metals and covalent bonds occur between metals and nonmetals.
B)   ionic bonds are between atoms that can share electrons; covalent bonds are between atoms that will donate/accept electrons.
C)   covalent bonds come about because of a sharing of electrons; ionic bonds do not.
D)   ionic bonds are between smaller atoms; covalent bonds are between large atoms.E) None of the above
F) A) and B) C

Question 8

What is the mass in grams of 3 moles of calcium carbonate, CaCO3, a common antacid?

Accepted Answer

A)   300 grams
B)   150 grams
C)   100 grams
D)   68 gramsE) A) and D)
F) A) and B)

Question 9

When considering the octet rule, the explanation of the O2- ion is

Accepted Answer

A)   a loss of two electrons to get closer to 8 in the energy level.
B)   when an oxygen atom gains two electrons, it has the same electron arrangement as neon, an inert gas.
C)   oxygen's nuclear charge of 8 can only hold 8 electrons in the outer shell.
D)   oxygen is an exception to the octet rule.E) A) and D)
F) A) and C)

Question 10

___ is the formula for aluminum fluoride.

Accepted Answer

The answer of ___ is the formula for aluminum fluoride....

Question 11

Generally, the octet rule works fairly well for predicting the behavior of atoms. However, there is an exception:

Accepted Answer

A)   The halogens do not form ions on the basis of the octet rule.
B)   The alkali metals only conform to the octet rule when producing neutral atoms.
C)   The transition metals do not necessarily conform to the octet rule.
D)   The nonmetals do not conform to the octet rule.E) A) and C)
F) B) and C)

Question 12

The formation of ions typically occurs when

Accepted Answer

A)   nonmetal atoms lose electrons and metals gain them.
B)   metal and nonmetal atoms are close together in the number of valence electrons.
C)   metal and nonmetal atoms have the same number of electrons.
D)   nonmetal atoms gain electrons and metal atoms lose them.E) All of the above
F) None of the above

Question 13

According to the octet rule, how many valence electrons are present in a chloride ion (Cl-) ?

Accepted Answer

A)   1
B)   2
C)   8
D)   4E) None of the above
F) C) and D) C

Question 14

Ionic compounds tend to exist in the ___ state at room temperature.

Accepted Answer

The answer of Ionic compounds tend to exist in the...

Question 15

Which of the following is a binary compound?

Accepted Answer

A)   NaOH
B)   FeCl3
C)   Ca 3(PO4) 2
D)   None of these choices is a binary compound.E) A) and B)
F) A) and C)

Question 16

The name of the compound Na2CO3 is

Accepted Answer

A)   sodium carbonate.
B)   disodium carbonate.
C)   sodium bicarbonate.
D)   disodium bicarbonate.E) A) and C)
F) B) and C)

Question 17

The formula weight of magnesium fluoride is 62.30 amu.

Accepted Answer

A) True 
 B)False  True

Question 18

How many electrons are contained in sulfide ion?

Accepted Answer

A)   18
B)   14
C)   30
D)   16E) B) and D)
F) C) and D)

Question 19

Which of the following is a cation?

Accepted Answer

A)   Ca2+
B)   Na
C)   Br
D)   O2-E) A) and B)
F) B) and C)

Question 20

Which ion has the same number of electrons as the noble gas argon?

Accepted Answer

A)   F-
B)   Mg2+
C)   Br-
D)   Ca2+E) A) and B)
F) A) and C)

Exam 3: Compounds

According to the octet rule, strontium (Sr) will form which of the following monoatomic ions?

Correct AnswerverifiedShow Answer

Give the name for each of the following: a) N2Br4 b) NH4Cl c) Fe(NO3)3 d) NaF

Correct Answerverifieda) dinitrogen tetrab...View AnswerShow Answer

Ethanol, C2H5OH, is found in alcoholic beverages. If a 125-g sample is pure ethanol, how many moles of ethanol are present?

Correct AnswerverifiedShow Answer

What is the formula of beryllium sulfide?

Correct AnswerverifiedShow Answer

Which pair of elements cannot combine to form a chemical compound?

Correct AnswerverifiedShow Answer

The oxygen gas found in the atmosphere contains ___ atom(s) per molecule.

Correct AnswerverifiedShow Answer

The difference between an ionic bond and a covalent bond is that

Correct AnswerverifiedC

What is the mass in grams of 3 moles of calcium carbonate, CaCO3, a common antacid?

Correct AnswerverifiedShow Answer

When considering the octet rule, the explanation of the O2- ion is

Correct AnswerverifiedShow Answer

___ is the formula for aluminum fluoride.

Correct AnswerverifiedShow Answer

Generally, the octet rule works fairly well for predicting the behavior of atoms. However, there is an exception:

Correct AnswerverifiedShow Answer

The formation of ions typically occurs when

Correct AnswerverifiedShow Answer

According to the octet rule, how many valence electrons are present in a chloride ion (Cl-) ?

Correct AnswerverifiedC

Ionic compounds tend to exist in the ___ state at room temperature.

Correct AnswerverifiedShow Answer

Which of the following is a binary compound?

Correct AnswerverifiedShow Answer

The name of the compound Na2CO3 is

Correct AnswerverifiedShow Answer

The formula weight of magnesium fluoride is 62.30 amu.

Correct AnswerverifiedTrue

How many electrons are contained in sulfide ion?

Correct AnswerverifiedShow Answer

Which of the following is a cation?

Correct AnswerverifiedShow Answer

Which ion has the same number of electrons as the noble gas argon?

Correct AnswerverifiedShow Answer

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Give the name for each of the following: a) N₂Br₄ b) NH₄Cl c) Fe(NO₃)₃ d) NaF

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a) dinitrogen tetrab...
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Ethanol, C₂H₅OH, is found in alcoholic beverages. If a 125-g sample is pure ethanol, how many moles of ethanol are present?

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C

What is the mass in grams of 3 moles of calcium carbonate, CaCO₃, a common antacid?

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When considering the octet rule, the explanation of the O^2- ion is

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According to the octet rule, how many valence electrons are present in a chloride ion (Cl^-) ?

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C

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The name of the compound Na₂CO₃ is

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True

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