Molec Shape And Bond 2

Question 1

Is the average distance from nucleus of an electron in a 2s orbital greater/lower than for an electron in an 1s orbital.
Why?

Answer 1

Greater
As 2s is a larger sphere
Average electron density is lower in 2s

Question 2

Where is the electron in 1s orbital

Answer 2

Anywhere in the sphere

Question 3

In a 2s atomic orbital what is the region called where the electron falls to 0

Answer 3

Node

Question 4

What is the node in terms of waves

Answer 4

Where there is no transverse displacement

Question 5

Describe the MO theory

Answer 5

AO are combined to make MOs

Question 6

Valence-bond theory

Answer 6

Electrons within the molecule remain in the AO but we don’t know which AO

Question 7

What molecule provides an accurate MO calculation

Answer 7

H2+

Question 8

What is the main rule of MO

Answer 8

Same number of MOs as starting AOs

Question 9

If you add wave functions what do you get

Answer 9

Bonding MO

Question 10

Subtracting wave functions leads to what

Answer 10

Anti-bonding molecular orbitals

Question 11

Anti bond orbital has a node and the electrons are likely to be found anywhere but between the nuclei
True/false

Answer 11

True

Question 12

Electrons in bond orbital most likely to be found between the nuclei
True/false

Answer 12

True

Question 13

What does end on 2p orbitals lead to

Answer 13

Sigma bonds

Question 14

What does side on 2p orbitals lead to

Answer 14

Pie bonds

Question 15

What is stronger sigma or pie

Answer 15

Sigma

Question 16

In carbon hybridisation we can mix 2s and 2p orbitals to create 4 new degenerate hybrid orbitals. What are these hybrid orbitals called

Answer 16

Sp3

Question 17

In sp3 what is the ration of s to p

Answer 17

1/4 s

3/4 p

Question 18

If there is 2 electro groups give the electron geometry, bond angle and hybridisation.

Answer 18

Linear
180
Sp

Question 19

If there is 3 electro groups give the electron geometry, bond angle and hybridisation.

Answer 19

Trigonal planar
120
Sp2

Question 20

If there is 4 electro groups give the electron geometry, bond angle and hybridisation.

Answer 20

Tetra
109.5
Sp3