Quantum Numbers Flashcards
1
Q
principal number (n)
A
size & energy of orbital
2
Q
angular momentum number (l)
A
✯ shape of orbital
✯ 0 - (n-1)
3
Q
magnetic number (ml)
A
✯ orientation of orbital
✯ -n to n
4
Q
spin (ms)
A
✯ spin of orbital
✯ -½ or ½
5
Q
Hund’s rule
A
fill empty orbitals before pairing them
6
Q
Pauli Exclusion principle
A
no 2 electrons can have the same set of 4 quantum numbers
7
Q
Aufbau’s principle
A
electrons fill lower-energy orbitals before higher-energy orbitals
(hint: helps predict electron configuration)
