Chapter 9 Molecular Geometries And Bonding Theories

Question 1

Valence Shell Electron Pair Repulsion Theory VSEPR

Answer 1

The best arrangement of a given number of electron domains is the one that minimizes the repulsion among them

Question 2

Electron domain geometry is often not

Answer 2

The shape of the molecule

Question 3

The molecular geometry is that defined by the positions of only the

Answer 3

Atoms in the molecules, not the non bonding pairs

Question 4

Linear domain

Answer 4

2 electron domains= linear

Question 5

Three electron domains

Answer 5

ED geometry- trigonal planer

2 BD- bent

Question 6

Nonbonding pairs are _______ thang bonding pairs

Answer 6

Physically larger

Question 7

4 Electron Domains

Answer 7

ED Geometry- tetrahedral

BD3 trigonal pyramidal

BD2 bent

Question 8

5 Electron Domains

Answer 8

ED Geometry- trigonal bipyramidal

ED 4- seesaw
ED3- t shaped
ED2- linear

Question 9

6 Electron Domains

Answer 9

ED Geometry- octahedral

BD5- square pyramidal
BD4- square planer

Question 10

Sigma bonds are

Answer 10

Head to head overlap with cylindrical symmetry

Question 11

Pi bonds are characterized by

Answer 11

Side to side overlap and electron electron density above and below the internuclear axis

Question 12

Single bonds are always

Answer 12

Sigma bonds because sigma overlap is greater resulting in a stronger bond

Question 13

In a multiple bond one of the bonds is a _____ and the rest are _______ bonds

Answer 13

Sigma, pi

Question 14

Destructive combination of orbitals leads to

Answer 14

Anti bonding molecular orbital

Question 15

Energy is higher in

Answer 15

Destructive anti bonding molecular orbital

Question 16

Calculating the bond order

Answer 16

1/2(bonding - antibonding electrons)

Bond order of zero means does not exist

Question 17

57pi?

Answer 17

Atoms 5-7

From bottom up

Sigma 2s, sigma 2s, pi2p, sigma2p, pi2p, sigma2*p

Atoms 8-10

Sigma pi sigma pi

Question 18

Paramagnetic

Answer 18

Unpaired electrons

Question 19

Bond angles for 2,3,4 Electron Domains

Answer 19

180, 120, 109.5