Electron Configuration of Atoms & Ions

Question 1

How many energy levels and orbitals are there?

Answer 1

7 energy levels (7 periods in PT)

4 orbital shapes (4 blocks in PT)

Question 2

What are the four orbital shapes?

Answer 2

SPDF (smart people do fine)

Question 3

Aufbau

Answer 3

“build up” “add a level, add a shape”

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 6d10

Question 4

Which fills first, 3d or 4s?

Answer 4

4s fills before 3d.

Question 5

Ions

Answer 5

Every time you make an ion, you have an electron configuration the same as the nearest
noble gas.

Making ions is +/- e-

Question 6

How should you think of electrons?

Answer 6

As your phone bill. if you take it (the electron) away, you are ☺, add another and you are ☹.

Question 7

Pauli’s Exclusion Principle:

Answer 7

(e- come in pairs) max # of e- in any orbital is 2, but they must have opposite spins. 

Question 8

Friederich Hund

Answer 8

???

Question 9

Hund’s rule

Answer 9

e- will add unpaired e- until forced to pair up in any orbital

Question 10

What is the S.I. unit of matter? and when are it’s special days?

Answer 10

mole (mol) June 2nd and Oct 23rd

Question 11

What is Avogadro’s #?

Answer 11

(6.02x1023) anythings