Question 1

The octet rule states that the formula for a compound is derived by

Accepted Answer

A)  using a minimum of 8 atoms. 
B)  using exactly 8 bonds in the formula unit. 
C)  having all atoms or ions get noble gas electron configurations. 
D)  having a net charge of magnitude 8. 
A)  using a minimum of 8 atoms. 
B)  using exactly 8 bonds in the formula unit. 
C)  having all atoms or ions get noble gas electron configurations. 
D)  having a net charge of magnitude 8. C

Question 2

When forming covalent compounds,atoms ______________ electrons.

Accepted Answer

share

Question 3

The concept that atoms tend to get eight electrons in their outer shell when forming molecules or ions is called the ______________.

Accepted Answer

octet rule

Question 4

A compound formed from atoms from the far left and the far right of the periodic table is probably a(n)______________ compound.

Accepted Answer

The answer of A compound formed from atoms from the...

Question 5

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 6

Which of the following ions would never form in chemical reactions?

Accepted Answer

A)  F2- 
B)  Al3+ 
C)  O2- 
D)  N3- 
A)  F2- 
B)  Al3+ 
C)  O2- 
D)  N3-

Question 7

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 which...

Question 8

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 9

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 10

If two atoms have equal electronegativity,a bond formed between them is generally

Accepted Answer

A)  ionic. 
B)  nonpolar. 
C)  very weak. 
D)  polar. 
A)  ionic. 
B)  nonpolar. 
C)  very weak. 
D)  polar.

Question 11

When atoms of two elements with a great difference in electronegativity bond together,the bonding is probably

Accepted Answer

A)  ionic. 
B)  polar covalent. 
C)  covalent. 
D)  metallic. 
A)  ionic. 
B)  polar covalent. 
C)  covalent. 
D)  metallic.

Question 12

A carbon dioxide molecule is

Accepted Answer

A)  linear and polar. 
B)  angular and polar. 
C)  linear and nonpolar. 
D)  angular and nonpolar. 
A)  linear and polar. 
B)  angular and polar. 
C)  linear and nonpolar. 
D)  angular and nonpolar.

Question 13

Suppose 25 g of reactant A is mixed with 45 g of reactant B.After a chemical reaction takes place between A and B,which statement is correct?

Accepted Answer

A)  The total mass of products plus any unreacted reactants will be 70 g. 
B)  The total mass of products plus any unreacted reactants will be less than 70 g. 
C)  The total mass of products plus any unreacted reactants will be more than 70 g. 
D)  The total mass of products will be 70 g. 
A)  The total mass of products plus any unreacted reactants will be 70 g. 
B)  The total mass of products plus any unreacted reactants will be less than 70 g. 
C)  The total mass of products plus any unreacted reactants will be more than 70 g. 
D)  The total mass of products will be 70 g.

Question 14

The percentage by mass of hydrogen in methane,CH4,is about

Accepted Answer

A)  25%. 
B)  75%. 
C)  80%. 
D)  20%. 
A)  25%. 
B)  75%. 
C)  80%. 
D)  20%.

Question 15

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 16

In the HCl molecule,the bonding electrons spend

Accepted Answer

A)  equal time around both atoms. 
B)  all their time around only one of the atoms. 
C)  more time around the H atom. 
D)  more time around the Cl atom. 
A)  equal time around both atoms. 
B)  all their time around only one of the atoms. 
C)  more time around the H atom. 
D)  more time around the Cl atom.

Question 17

What is the formula of a compound formed from the ions M2+ and X3-?

Accepted Answer

A)  MX 
B)  M3X2 
C)  M2X3 
D)  M6X6 
A)  MX 
B)  M3X2 
C)  M2X3 
D)  M6X6

Question 18

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 19

Electronegativity increases ______________ across a period and ______________ in a group.

Accepted Answer

A)  right to left; bottom to top 
B)  left to right; top to bottom 
C)  right to left; top to bottom 
D)  left to right; bottom to top 
A)  right to left; bottom to top 
B)  left to right; top to bottom 
C)  right to left; top to bottom 
D)  left to right; bottom to top

Question 20

The Lewis symbol would be characteristic of which group   ?

Accepted Answer

A)  6A 
B)  8A 
C)  3A 
D)  7A 
A)  6A 
B)  8A 
C)  3A 
D)  7A

Exam 12: Chemical Bonding

The octet rule states that the formula for a compound is derived by

When forming covalent compounds,atoms ______________ electrons.

The concept that atoms tend to get eight electrons in their outer shell when forming molecules or ions is called the ______________.

A compound formed from atoms from the far left and the far right of the periodic table is probably a(n)______________ compound.

If atoms unite by transfer of electrons,they form

Which of the following ions would never form in chemical reactions?

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

A methane molecule is

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

If two atoms have equal electronegativity,a bond formed between them is generally

When atoms of two elements with a great difference in electronegativity bond together,the bonding is probably

A carbon dioxide molecule is

Suppose 25 g of reactant A is mixed with 45 g of reactant B.After a chemical reaction takes place between A and B,which statement is correct?

The percentage by mass of hydrogen in methane,CH4,is about

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?

In the HCl molecule,the bonding electrons spend

What is the formula of a compound formed from the ions M2+ and X3-?

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

Electronegativity increases ______________ across a period and ______________ in a group.

The Lewis symbol would be characteristic of which group ?

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

The percentage by mass of hydrogen in methane,CH₄,is about

What is the formula of a compound formed from the ions M²⁺ and X^3-?

Electronegativity increases across a period and in a group.