Geometry

Question 1

Electron pair geometry

Answer 1

Relative positions in 3-D space of all bonding pairs and lone pairs of valence electrons on the central atom

Question 2

Molecular geometry

Answer 2

Relative positions of atoms in a molecule

Question 3

Steric number

Answer 3

Number of atoms bonded to central atom + number of lone pairs on central atom

Question 4

SN=3, no lone pairs

Answer 4

Trigonal planar; 120°

Question 5

Sn=3, lone pairs = 1

Answer 5

Trigonal planar; bent; <120°

Question 6

Sn=4, no lone pairs

Answer 6

Tetrahedral; 109.5°

Question 7

Sn=4, lone pairs=1

Answer 7

Trigonal pyramidal; <109.5°

Question 8

Sn=4, lone pairs=2

Answer 8

Bent; <109.5°

Question 9

Sn=5, no lone pairs

Answer 9

Trigonal bipyramidal; 90°, 120°

Question 10

Sn=5, lone pairs =1

Answer 10

Seesaw; < 90°, <120°

Question 11

Sn=5, lone pairs=2

Answer 11

T-shaped; <90°

Question 12

Sn=5, lone pairs= 3

Answer 12

Linear; 180°