Electronic configurations

Question 1

What are the four different orbitals that hold electrons?

Answer 1

S, P, D and F

Question 2

How many electrons does the s-orbital hold?

How many electrons does the p - orbital hold?

How many electrons does the d - orbital hold?

How many electrons does the f - orbital hold?

Answer 2

S - orbital = 2 electrons

P - orbital = 6 electrons

D orbital = 10 electrons

F orbital = 14 electrons

Question 3

What order are the orbitals filled in?

Answer 3

The energy of the orbitals increases from s, p, d and then f, meaning the orbitals are filled in this order

Question 4

When filling 4s and 3d, why is 4s filled up first, instead of sub shell 3d then 4s?

Answer 4

3d is higher in energy than 4s and so gets filled after the 4s

Question 5

Write the electronic configuration of carbon (C)
(RAM = 12)

Answer 5

1s2, 2s2, 2p6, 3s2

Question 6

Write the electronic configuration of iron (Fe)

Answer 6

1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d6

Question 7

Write the electronic configuration of selenium

Answer 7

1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p4

OR

[Ar] 4s2, 3d10, 4p4

Question 8

When removing electrons, what subshell do you remove first from?

Answer 8

The 4s2 sub shell

Question 9

Write the electronic configuration of Fe+3

Answer 9

[Ar] 3d5 4s0