Electron Configuration

Question 1

What directions do the electrons spin in each orbital?

Answer 1

Opposite directions!

Question 2

What is an orbital?

Answer 2

The region of space that electrons are most likely to be in.

Question 3

What is Aufbau’s principle?

Answer 3

That Electrons enter the lowest energy orbital available.

Question 4

What is Hund’s rule?

Answer 4

Hund’s rule is that electrons prefer to occupy orbitals on their own, and any pair up ONLY when no empty orbitals of the same energy are available!

Question 5

When writing configurations of atoms, what is an important rule?

Answer 5

Fill from the lowest energy level first.

Question 6

What are the maximum number of electrons in sub-levels s,p,d and f?

Answer 6

s: 2
p:6
d:10
f:14

Question 7

What are the 2 exceptions to expect?

Answer 7

1. Crodium (Cr): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5
2. Copper (Cu): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^10

Question 8

What groups are in block p?

Answer 8

Groups 3,4,5,6,7,8 (except He- that’s group S!

Question 9

What groups are in block S?

Answer 9

Group 1 and Group 2 ( including hydrogen(H) and Helium (He) )

Question 10

Knowing that shells have “sub-shells”, how many electrons are held by the electron orbitals?

Answer 10

2 electrons can be held for every electron orbital!