Question 1

A methane molecule is

Accepted Answer

A)  flat and polar. 
B)  flat and nonpolar. 
C)  tetrahedral and nonpolar. 
D)  pyramidal and polar. 
A)  flat and polar. 
B)  flat and nonpolar. 
C)  tetrahedral and nonpolar. 
D)  pyramidal and polar.

Question 2

Draw the Lewis structure for Freon-12, CF2Cl2.

Accepted Answer

Question 3

If atoms unite by transfer of electrons, they form

Accepted Answer

A)  an organic compound. 
B)  an ionic compound. 
C)  a polar molecule. 
D)  a covalent compound. 
A)  an organic compound. 
B)  an ionic compound. 
C)  a polar molecule. 
D)  a covalent compound.

Question 4

A general principle of ionic compound formation is that the total ionic charge in the formula unit must be

Accepted Answer

A)  0. 
B)  no greater than that of the metal ion. 
C)  between +4 and -4. 
D)  no less than that of the nonmetal ion. 
A)  0. 
B)  no greater than that of the metal ion. 
C)  between +4 and -4. 
D)  no less than that of the nonmetal ion.

Question 5

When atoms unite by transferring electrons, they should form

Accepted Answer

A)  a polar molecule. 
B)  a covalent compound. 
C)  an ionic compound. 
D)  an organic compound. 
A)  a polar molecule. 
B)  a covalent compound. 
C)  an ionic compound. 
D)  an organic compound.

Question 6

Which of the following was not a part of Dalton's atomic theory?

Accepted Answer

A)  Each element is composed of atoms, which are identical for that element. 
B)  The reactivity of elements involves changes in their electron configuration. 
C)  Chemical combination is the bonding of a definite number of atoms of each of the combining elements. 
D)  No atoms are gained, lost, or changed in identity during a chemical reaction. 
A)  Each element is composed of atoms, which are identical for that element. 
B)  The reactivity of elements involves changes in their electron configuration. 
C)  Chemical combination is the bonding of a definite number of atoms of each of the combining elements. 
D)  No atoms are gained, lost, or changed in identity during a chemical reaction.

Question 7

What is the formula of a compound formed from the ions M1+ and X1-?

Accepted Answer

A)  M2X 
B)  MX 
C)  M2X2 
D)  MX2 
A)  M2X 
B)  MX 
C)  M2X2 
D)  MX2

Question 8

What electric charge is characteristic for an ion of Cl?

Accepted Answer

A)  7+ 
B)  0 
C)  1- 
D)  1+ 
A)  7+ 
B)  0 
C)  1- 
D)  1+

Question 9

Element A, mass 5.00 g, reacts exactly with 2.00 g of element B to form 7.00 g of compound AB. If 10.00 g of element A are reacted with 2.00 g of element B to form the same compound, what mass of compound AB will be formed?

Accepted Answer

A)  7.00 g 
B)  5.00 g 
C)  17.00 g 
D)  12.00 g 
A)  7.00 g 
B)  5.00 g 
C)  17.00 g 
D)  12.00 g

Question 10

The statement "Different samples of a pure compound always contain the same elements in the same proportion by mass" is known as the law of ______________.

Accepted Answer

definite p

Question 11

What is the formula of a compound formed from the ions M3+ and X3-?

Accepted Answer

A)  M2X 
B)  MX 
C)  M2X3 
D)  MX2 
A)  M2X 
B)  MX 
C)  M2X3 
D)  MX2

Question 12

The anion in the common ionic substance NaHCO3 is

Accepted Answer

A)  CO32-. 
B)  H+. 
C)  Na+. 
D)  HCO3-. 
A)  CO32-. 
B)  H+. 
C)  Na+. 
D)  HCO3-.

Question 13

A(n) ______________ covalent bond is one in which the electrons are shared unequally.

Accepted Answer

The answer of A(n) ______________ covalent bond is one in...

Question 14

Mn is a transition element and can form several ions. Its ionic charge in MnF3 must be ______________.

Accepted Answer

Question 15

When forming ionic compounds, atoms ______________ electrons.

Accepted Answer

The answer of When forming ionic compounds, atoms ______________ electrons....

Question 16

A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 63.9% and that of C is 12.2%, what is the percentage by mass of O?

Accepted Answer

A)  76.1% 
B)  23.9% 
C)  51.7% 
D)  70.9% 
E)  None of the above 
A)  76.1% 
B)  23.9% 
C)  51.7% 
D)  70.9% 
E)  None of the above

Question 17

Ice is less dense than liquid water because of ______________ bonding.

Accepted Answer

The answer of Ice is less dense than liquid water...

Question 18

Which of the following ions is isoelectronic with a neon atom?

Accepted Answer

A)  N3- 
B)  Li+ 
C)  Cl- 
D)  F2- 
A)  N3- 
B)  Li+ 
C)  Cl- 
D)  F2-

Question 19

Which pair of elements is least likely to form an ionic bond?

Accepted Answer

A)  K and H 
B)  Al and F 
C)  N and Cl 
D)  S and Sr 
A)  K and H 
B)  Al and F 
C)  N and Cl 
D)  S and Sr

Question 20

When sodium and chlorine react to form sodium chloride, an ionic compound,

Accepted Answer

A)  each sodium atom gains two electrons. 
B)  each sodium atom gains one electron. 
C)  each chlorine atom gains one electron. 
D)  each chlorine atom gains two electrons. 
A)  each sodium atom gains two electrons. 
B)  each sodium atom gains one electron. 
C)  each chlorine atom gains one electron. 
D)  each chlorine atom gains two electrons.

Exam 12: Chemical Bonding

A methane molecule is

Draw the Lewis structure for Freon-12, CF2Cl2.

If atoms unite by transfer of electrons, they form

A general principle of ionic compound formation is that the total ionic charge in the formula unit must be

When atoms unite by transferring electrons, they should form

Which of the following was not a part of Dalton's atomic theory?

What is the formula of a compound formed from the ions M1+ and X1-?

What electric charge is characteristic for an ion of Cl?

Element A, mass 5.00 g, reacts exactly with 2.00 g of element B to form 7.00 g of compound AB. If 10.00 g of element A are reacted with 2.00 g of element B to form the same compound, what mass of compound AB will be formed?

The statement "Different samples of a pure compound always contain the same elements in the same proportion by mass" is known as the law of ______________.

What is the formula of a compound formed from the ions M3+ and X3-?

The anion in the common ionic substance NaHCO3 is

A(n) ______________ covalent bond is one in which the electrons are shared unequally.

Mn is a transition element and can form several ions. Its ionic charge in MnF3 must be ______________.

When forming ionic compounds, atoms ______________ electrons.

A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 63.9% and that of C is 12.2%, what is the percentage by mass of O?

Ice is less dense than liquid water because of ______________ bonding.

Which of the following ions is isoelectronic with a neon atom?

Which pair of elements is least likely to form an ionic bond?

When sodium and chlorine react to form sodium chloride, an ionic compound,

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Draw the Lewis structure for Freon-12, CF₂Cl₂.

What is the formula of a compound formed from the ions M¹⁺ and X^1-?

What is the formula of a compound formed from the ions M³⁺ and X^3-?

The anion in the common ionic substance NaHCO₃ is

Mn is a transition element and can form several ions. Its ionic charge in MnF₃ must be ______________.