1.2 Electron Configuration

Question 1

How many orbitals do S P D & F have and how many electrons can each of them hold?

Answer 1

S = 1 orbital and 2 electrons
P = 3 orbitals and 6 electrons
D = 5 orbitals and 10 electrons
F = 7 orbitals and 14 electrons

Question 2

Paramagnetic vs diamagnetic?

Answer 2

Paramagnetic: Attracted towards magnet field…Unpaired electrons…An odd number of electrons.

Diamagnetic: Not attracted towards magnetic field…Slight deflection away from magnetic field… Electrons paired…An even number of electrons.

Question 3

S P D & F Orbital pyramid

Answer 3

7S
6S 6P 6D
5S 5P 5D 5F
4S 4P 4D 4F
3S 3P 3D 
2S 2P
1S

Question 4

What elements are exceptions to electron configuration?

Answer 4

Cr Cu
Mo Ag
Au

Question 5

Electron configuration rules to know…

Answer 5

• Full D orbitals do not count towards valence electrons, but are considered core electrons.
• When writing out the electron configuration for an ion, remove electrons from the higher numbered shell.

(i.e.)
Zn
[Ar]4S2 3D10

ZN2+
[Ar]3D10