Electron Configuration

Question 1

Structure of sub shells

Answer 1

1st shell : 1S

2nd shell: 2S, 2P

3rd shell: 3S,3P, 3D

4th shell: 4S, 4P, 4D, 4F

Question 2

Number of electrons that the first four electrons can hold.

Answer 2

1st: 1S = 2.

2nd: 2S,2P: 2+(3x2)= 8
3rd: 3S,3P,3D: 2+(3x2)+(5x2)=18.
4th: 4S,4P,4D,4F: 2+(3x2)+(5x2)+(7x2) =32

Question 3

Use the sub-shell notation for the electronic configuration of Krypton (36é)

Answer 3

1s^2 , 2S^2, 2P^6, 3S^2, 3P^6, 4S^2, 3D^10,4P^6

Question 4

Use the sub-shell notation to find the Electronic configuration of Nitrogen (7)

Answer 4

1s^2 , 2s^2, 2p^3

Question 5

Use the sub-shell notation to find the electronic configuration of Gallium.

Answer 5

1S^2, 2S^2, 2P^6, 3S^2, 3P^6, 4S^2, 3D^10, 4P^1

Question 6

Using sub-shell notation find the electronic configuration of Chromium (24é) and Cooper (29é).

Answer 6

Cr: 1S^2, 2S^2,2P^6,3S^2, 3P^6, 4S^1, 3D^5

Cu: 1S^2, 2S^2, 2P^6, 3S^2, 3P^6, 4S^1, 3D^10