Chapter 8 - VSEPR shapes and numbers and stuff

Question 1

Name the overall shape and angle(s) for a molecule with 2 domains (bonds and lone electron pairs)

Answer 1

Linear, 180 degrees

Question 2

Name the overall shape and angle(s) for a molecule with 3 domains (bonds and lone electron pairs)

Answer 2

Trigonal planar, 120 degrees

Question 3

Name the overall shape and angle(s) for a molecule with 4 domains (bonds and lone electron pairs)

Answer 3

tetrahedral, 109 degrees

Question 4

Name the overall shape and angle(s) for a molecule with 5 domains (bonds and lone electron pairs)

Answer 4

trigonal bipyramidal, 120 degrees across the equator, 90 degrees from the axis to the equator

Question 5

Name the overall shape and angle(s) for a molecule with 6 domains (bonds and lone electron pairs)

Answer 5

Octahedral, 90 degrees all around

Question 6

Name the shape and angles for a trigonal planar molecule with a lone pair replacing an atom

Answer 6

bent, <120 degrees

Question 7

Name the lone pair variants of tetrahedral molecules and their angles

Answer 7

1 lone pair - Pyrimidal, <109 (or 107) degrees
2 lone pairs - Bent, 104.5 degrees

Question 8

Name the lone pair variants of trigonal bipyramidal molecules and their angles

Answer 8

1 LP - See-saw, <120 degrees equatorial, <90 degrees from axis to equator
2 LP - T-shaped, <90 degrees
3 LP - Linear triatomic, 180 degrees exactly

Question 9

Name the lone pair variants of Octahedral molecules and their angles

Answer 9

1 LP - Square pyramidal, <90 degrees
2 LP - Square planar, 90 degrees exactly
3 LP - T-shaped, <90 degrees
4 LP - Linear triatomic, 180 degrees exactly

Question 10

How many bonds and lone pairs does carbon “prefer” to have?

Answer 10

4 bonds 0 lone

Question 11

How many bonds and lone pairs does nitrogen “prefer” to have?

Answer 11

3 bonds 1 lone pair

Question 12

How many bonds and lone pairs does oxygen “prefer” to have?

Answer 12

2 bonds 2 lone pairs

Question 13

How many bonds and lone pairs does hydrogen “prefer” to have?

Answer 13

1 bond 0 lone pairs

Question 14

How many bonds and lone pairs do halogens “prefer” to have?

Answer 14

1 bond 3 lone pairs