Question 1

What is the formula of the compound with the name tetraphosphorus pentoxide?

Accepted Answer

The answer of What is the formula of the compound...

Question 2

The compound dinitrogen trioxide would have the chemical formula

Accepted Answer

A) NO₃. 
B) N₃O₂. 
C) N₂O₃. 
D) N₂O₅. 
A) NO₃. 
B) N₃O₂. 
C) N₂O₃. 
D) N₂O₅.

Question 3

A sodium ion is

Accepted Answer

A) Na⁺. 
B) Na²⁺. 
C) Na⁻. 
D) Na²⁻. 
A) Na⁺. 
B) Na²⁺. 
C) Na⁻. 
D) Na²⁻.

Question 4

The cation formed when a sodium atom loses an electron is called the

Accepted Answer

A) sodide ion. 
B) sodate ion. 
C) sodium ion. 
D) soda ion. 
A) sodide ion. 
B) sodate ion. 
C) sodium ion. 
D) soda ion.

Question 5

Which one of the following compounds does NOT obey the "octet rule"?

Accepted Answer

A) CO₂ 
B) CH₄ 
C) SCl₆ 
D) NH₃ 
A) CO₂ 
B) CH₄ 
C) SCl₆ 
D) NH₃

Question 6

The chemical formula for silver sulfate is

Accepted Answer

A) AgSO₄. 
B) Ag₂SO₄. 
C) Ag(SO₄)₂. 
D) Ag₃SO₄. 
A) AgSO₄. 
B) Ag₂SO₄. 
C) Ag(SO₄)₂. 
D) Ag₃SO₄.

Question 7

Chlorine forms monatomic ions with a charge of

Accepted Answer

A) 1-. 
B) 1+. 
C) 2-. 
D) 2+. 
A) 1-. 
B) 1+. 
C) 2-. 
D) 2+.

Question 8

With respect to chemical bonding,which particles play the least active role?

Accepted Answer

A) nucleons 
B) core electrons 
C) valence electrons 
D) All play equal roles. 
A) nucleons 
B) core electrons 
C) valence electrons 
D) All play equal roles.

Question 9

Which of the following elements has the lowest electronegativity?

Accepted Answer

A) K 
B) Kr 
C) Br 
D) Se 
A) K 
B) Kr 
C) Br 
D) Se

Question 10

The name of the compound S₂O₃ is

Accepted Answer

A) disulfur oxide. 
B) disulfur trioxide. 
C) sulfur oxide. 
D) sulfur trioxide. 
A) disulfur oxide. 
B) disulfur trioxide. 
C) sulfur oxide. 
D) sulfur trioxide.

Question 11

In the hydrogen chloride molecule,HCl,the chlorine end of the molecule is more negative than the hydrogen end because

Accepted Answer

A) chlorine is more electronegative than hydrogen. 
B) hydrogen is more electronegative than chlorine. 
C) hydrogen and chlorine have the same electronegativity. 
D) hydrogen transfers an electron to chlorine. 
A) chlorine is more electronegative than hydrogen. 
B) hydrogen is more electronegative than chlorine. 
C) hydrogen and chlorine have the same electronegativity. 
D) hydrogen transfers an electron to chlorine.

Question 12

From the periodic table,the number of valence electrons for most of the main group elements may be determined directly from the

Accepted Answer

A) atomic number. 
B) group number. 
C) period number. 
D) nucleon number. 
A) atomic number. 
B) group number. 
C) period number. 
D) nucleon number.

Question 13

In a Lewis formula,the dots represent

Accepted Answer

A) all the electrons in the atoms. 
B) the valence electrons in all the atoms. 
C) only the electrons that are being transferred or shared. 
D) whatever number of electrons are needed to satisfy the octet rule. 
A) all the electrons in the atoms. 
B) the valence electrons in all the atoms. 
C) only the electrons that are being transferred or shared. 
D) whatever number of electrons are needed to satisfy the octet rule.

Question 14

Which of the following pairs of atoms will form a polar covalent bond?

Accepted Answer

A) Ne and Ar 
B) H and O 
C) H and C 
D) C and C 
A) Ne and Ar 
B) H and O 
C) H and C 
D) C and C

Question 15

The correct formula for the nitrite ion is

Accepted Answer

A) NO₃⁻. 
B) NO₃²⁻. 
C) NO₂²⁻. 
D) NO₂⁻. 
A) NO₃⁻. 
B) NO₃²⁻. 
C) NO₂²⁻. 
D) NO₂⁻.

Question 16

Which is the electron dot structure of oxygen?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 17

Electrons in a nonpolar covalent bond are shared equally between two atoms.

Accepted Answer

A) True 
 B)False

Question 18

If a central atom has a total of three electron sets and no lone pairs attached to it,the geometry about the central atom is

Accepted Answer

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

Question 19

An element with 7 electrons in its outer shell is in which group on the periodic table?

Accepted Answer

A) Group 5A 
B) Group 7A 
C) Group 6A 
D) Group 2A 
A) Group 5A 
B) Group 7A 
C) Group 6A 
D) Group 2A

Question 20

In a covalent bond,the shared electrons are sometimes referred to as

Accepted Answer

A) core electrons. 
B) bonding pairs. 
C) nonbonding pairs. 
D) neutral pairs. 
A) core electrons. 
B) bonding pairs. 
C) nonbonding pairs. 
D) neutral pairs.

Exam 4: Chemical Bonds

What is the formula of the compound with the name tetraphosphorus pentoxide?

The compound dinitrogen trioxide would have the chemical formula

A sodium ion is

The cation formed when a sodium atom loses an electron is called the

Which one of the following compounds does NOT obey the "octet rule"?

The chemical formula for silver sulfate is

Chlorine forms monatomic ions with a charge of

With respect to chemical bonding,which particles play the least active role?

Which of the following elements has the lowest electronegativity?

The name of the compound S₂O₃ is

In the hydrogen chloride molecule,HCl,the chlorine end of the molecule is more negative than the hydrogen end because

From the periodic table,the number of valence electrons for most of the main group elements may be determined directly from the

In a Lewis formula,the dots represent

Which of the following pairs of atoms will form a polar covalent bond?

The correct formula for the nitrite ion is

Which is the electron dot structure of oxygen?

Electrons in a nonpolar covalent bond are shared equally between two atoms.

If a central atom has a total of three electron sets and no lone pairs attached to it,the geometry about the central atom is

An element with 7 electrons in its outer shell is in which group on the periodic table?

In a covalent bond,the shared electrons are sometimes referred to as

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