1
Q
The Pauli exclusion principle
A
In any atom no 2 electrons may have a set of quantum numbers with the same values.
2
Q
How do we obey the Pauli exclusion principle
A
Tala into account magnetic quantum number MS
3
Q
Magnetic quantum number MS
A
Electrons can spin in 2 directions, either + 1/2 or
- 1/2
4
Q
Electrons with the same MS have…
A
Parallel spins
5
Q
Electrons with diff MS have
A
Opposite spins
6
Q
The aufbau principle
A
Orbitals of the lowest energy levels are filled up first.
7
Q
Hunds rule
A
When filling up a degenerate set of orbitals electrons will not form pairs until all of the orbitals have a single electron in them.
8
Q
Core electrons
A
Electrons that are not on the outer shell.
Foundation Chemistry
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