midterm #2

Question 1

AXnEm

Answer 1

A = central atom
X = bonded atoms
n = # of bonded atoms
E = lone pairs
m = number of lone pairs

Question 2

SN table

Answer 2

2:
- 180 deg
- linear
- AX2
3:
- 120 deg
- trig planar
- AX3, AX2E (bent)
4:
- 109 deg
- tetrahedron
- AX4, AX3E (trig pyramid), AX2E2 (bent), AXE3 (linear)
5:
- 90 deg
- trig bipyramid
- AX5, AX4E (seesaw), AX3E2 (T), AX2E3 (linear)
6:
- 90 deg
- octahedral
- AX6, AX5E (square pyramid), AX4E2 (square planar)

Question 3

Formal Charge

Answer 3

VE - # bonds - non-bonding e-s