test 4

Question 1

There are 4 shared electrons in a single covalent bond.

Answer 1

False, 2

Question 2

The most electronegative atom in a molecule will be found in the
center of the molecule.

Answer 2

False, least

Question 3

Polyatomic ions are held together by covalent bonding.

Answer 3

True

Question 4

There are a total of 24 valence electrons available for bonding the
sulfur trioxide molecule.

Answer 4

True

Question 5

The ozone molecule (O 3 ) will have a 120 degree bond angle.

Answer 5

True

Question 6

There are two lone pairs of electrons on the iodine in the IF 2 1- ion.

Answer 6

False, 3

Question 7

Sulfur hexafluoride will exhibit an octahedral molecular geometry.

Answer 7

True

Question 8

How do we name molecules?

Answer 8

Using a prefix system

Question 9

How do we write chemical formulas for molecules?

Answer 9

The prefixes are used to
describe the number of atoms of that element present in the molecule
(subscripts)

Question 10

What 2 familiar compounds use common names instead of systematic names?

Answer 10

Water and ammonia (H 2 O and NH 3

Question 11

Why does it form?

Answer 11

Give atoms a noble gas configuration (octet)

Question 11

What is a covalent bond?

Answer 11

Force between nonmetal atoms

Question 12

What does it form?

Answer 12

molecule

Question 13

How does it form?

Answer 13

localized sharing of valence electrons

Question 14

How many electrons can be shared in a covalent bond?

Answer 14

Six max between two
atoms (triple bond)

Question 15

What are the nonbonding electrons called?

Answer 15

Lone pair electrons

Question 16

Why are nonbonding electrons sometimes present on atoms?

Answer 16

Get to noble gas
arrangement in conjunction with bonded electron pairs

Question 17

How can we represent covalent bonding visually?

Answer 17

Lewis dot diagram

Question 18

What exceptions exist to the octet rule?

Answer 18

H, Be, B, and expanded valence

Question 19

How do we create Lewis structural diagrams?

Answer 19

Six steps – see your notes.

Question 20

What is VSEPR?

Answer 20

Valence shell electron pair repulsion model - used for predicting
shapes of molecules

Question 21

What is a steric number?

Answer 21

Number of bonds + number of lone pairs on central
atom

Question 22

What is molecular geometry?

Answer 22

Shape of molecule

Question 23

What is a bond angle?

Answer 23

Angle between bonds in molecule