electron and molecular geometry

Question 1

Electron domain geometry of molecules with two electron domains + moleclar geo + angle

Answer 1

linear
-180 degrees
Ex. CO2

Question 2

Electron domain geometry with three electron domains

Answer 2

trigonal planer
No lone pair= trigonal planar, 120 degrees
lone pair= bent, little less than 120

Question 3

Electron domain geometry with four electron domains

Answer 3

tetrahedral

no lone pairs = tetrahedral, 109.5 degrees

one lone pair= trigonal pyramidal, 107.8 degrees

two lone pair= bent, 104.5

Question 4

how do you calculate the bond order?

Answer 4

to divide the sum of the individual bond orders by the number of bonding groups.

Ex: bond order of CO3 2–.

The carbonate ion is composed of two single bonds and one double bond. The sum of the individual bond orders is 1+1+2 = 4. There are 3 bonding groups in the ion (two single bonds and one double bond), therefore, the bond order is:

4/3 =1.33