Question 1

How many electrons are there in a double bond?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
A) 1 
B) 2 
C) 4 
D) 6

Question 2

Which of the following elements has the highest electronegativity?

Accepted Answer

A) O 
B) H 
C) Cl 
D) F 
A) O 
B) H 
C) Cl 
D) F

Question 3

Which substance has nonpolar covalent bonds?

Accepted Answer

A) H₂ 
B) NO₂ 
C) NaBr 
D) CO 
A) H₂ 
B) NO₂ 
C) NaBr 
D) CO

Question 4

Which substance has covalent bonds?

Accepted Answer

A) KF 
B) NaF 
C) MgI₂ 
D) CO₂ 
A) KF 
B) NaF 
C) MgI₂ 
D) CO₂

Question 5

Calcium reacts with chloride to form

Accepted Answer

A) CaCl. 
B) CaCl₂. 
C) Ca₂Cl. 
D) Ca₂Cl₃. 
A) CaCl. 
B) CaCl₂. 
C) Ca₂Cl. 
D) Ca₂Cl₃.

Question 6

A sodium ion,Na⁺,has the same electron configuration as a(n)

Accepted Answer

A) sodium atom. 
B) chlorine atom. 
C) neon atom. 
D) argon atom. 
A) sodium atom. 
B) chlorine atom. 
C) neon atom. 
D) argon atom.

Question 7

The number of electrons in a chloride ion,Cl⁻,is

Accepted Answer

A) 16. 
B) 17. 
C) 18. 
D) 35. 
A) 16. 
B) 17. 
C) 18. 
D) 35.

Question 8

What is the formula of potassium sulfate?

Accepted Answer

The answer of What is the formula of potassium sulfate?...

Question 9

Which of the noble gases does NOT have an octet of electrons in its outer shell?

Accepted Answer

A) He 
B) Ne 
C) Ar 
D) Kr 
A) He 
B) Ne 
C) Ar 
D) Kr

Question 10

What is the formula of iron(III)phosphate?

Accepted Answer

The answer of What is the formula of iron(III)phosphate?...

Question 11

________ is the measure of the tendency of an atom in a molecule to attract a shared pair of electrons to itself.

Accepted Answer

A) Ionization 
B) Electronegativity 
C) Polarity 
D) Precipitation 
A) Ionization 
B) Electronegativity 
C) Polarity 
D) Precipitation

Question 12

What is the name of the compound with the formula CF₄?

Accepted Answer

A) carbon fluoride 
B) carbon(IV)fluoride 
C) fluorine carbonide 
D) carbon tetrafluoride 
A) carbon fluoride 
B) carbon(IV)fluoride 
C) fluorine carbonide 
D) carbon tetrafluoride

Question 13

The VSEPR theory is based on

Accepted Answer

A) the neutralization of ionic charge in a molecule. 
B) the minimization of repulsion among valence electron pairs. 
C) the arrangement of core electrons in a molecule. 
D) the loss and gain of electrons based on electronegativity. 
A) the neutralization of ionic charge in a molecule. 
B) the minimization of repulsion among valence electron pairs. 
C) the arrangement of core electrons in a molecule. 
D) the loss and gain of electrons based on electronegativity.

Question 14

The number of electrons contained in several molecules and ions is shown below.Which of the following is most likely to be a free radical?

Accepted Answer

A) 12 
B) 13 
C) 16 
D) 18 
A) 12 
B) 13 
C) 16 
D) 18

Question 15

NO₂⁻ is the ________ ion.

Accepted Answer

A) ammonium 
B) cyanide 
C) nitrate 
D) nitrite 
A) ammonium 
B) cyanide 
C) nitrate 
D) nitrite

Question 16

The shape of the carbon dioxide molecule is

Accepted Answer

A) pyramidal. 
B) trigonal planar. 
C) tetrahedral. 
D) linear. 
A) pyramidal. 
B) trigonal planar. 
C) tetrahedral. 
D) linear.

Question 17

When magnesium reacts with chlorine,the reaction involves a

Accepted Answer

A) transfer of electrons from Mg to Cl. 
B) transfer of electrons from Cl to Mg. 
C) sharing of electrons between Mg and Cl. 
D) creation of electrons. 
A) transfer of electrons from Mg to Cl. 
B) transfer of electrons from Cl to Mg. 
C) sharing of electrons between Mg and Cl. 
D) creation of electrons.

Question 18

The number of protons in a sodium ion,Na⁺,is

Accepted Answer

A) 10. 
B) 11. 
C) 12. 
D) 23. 
A) 10. 
B) 11. 
C) 12. 
D) 23.

Question 19

Medicinal chemists use the shapes of molecules and forces between them to create new life-saving or life-changing medicines.

Accepted Answer

A) True 
 B)False

Question 20

Hydrogen and carbon react to form

Accepted Answer

A) CH. 
B) CH₂. 
C) CH₃. 
D) CH₄. 
A) CH. 
B) CH₂. 
C) CH₃. 
D) CH₄.

Exam 4: Chemical Bonds

How many electrons are there in a double bond?

Which of the following elements has the highest electronegativity?

Which substance has nonpolar covalent bonds?

Which substance has covalent bonds?

Calcium reacts with chloride to form

A sodium ion,Na⁺,has the same electron configuration as a(n)

The number of electrons in a chloride ion,Cl⁻,is

What is the formula of potassium sulfate?

Which of the noble gases does NOT have an octet of electrons in its outer shell?

What is the formula of iron(III)phosphate?

________ is the measure of the tendency of an atom in a molecule to attract a shared pair of electrons to itself.

What is the name of the compound with the formula CF₄?

The VSEPR theory is based on

The number of electrons contained in several molecules and ions is shown below.Which of the following is most likely to be a free radical?

NO₂⁻ is the ________ ion.

The shape of the carbon dioxide molecule is

When magnesium reacts with chlorine,the reaction involves a

The number of protons in a sodium ion,Na⁺,is

Medicinal chemists use the shapes of molecules and forces between them to create new life-saving or life-changing medicines.

Hydrogen and carbon react to form

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