Not Sure

Question 1

Draw nitrogen using both diagrams

Answer 1

1s^22s^22p^3
<> <> < < <

Question 2

Rules for adding/removing electrons

Answer 2

Adding = add to 4s before 3d
Removing = remove 4s before 3d

Question 3

Order of shells/sub shells with increasing energy

Answer 3

1s2 2s2 2p6 3s2 3p6 4s2 3d10

Question 4

Out of these, which 2 elements are the exception (in terms of electronic figuration):
Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn

Answer 4

Cr = < ««< or 1s2 2s2 2p6 3s2 3p6 4s1 3d5
Cu = < <><><><><> or 1s2 2s2 2p6 3s2 3p6 4s1 3d10

Question 5

What are the Cr and Cu exceptions, in terms of their electronic configuration?

Answer 5

Cr has 1 arrow in each box rather than 2 in the 1st and none in the last box, as this makes it more stable.
Cu has 1 arrow in the 1st box and 2 in the next 5 rather than 2 in the 1st 5 and 1 in the last box, as this makes it more stable.