0
Q
Cr configuration
A
[Ar] 3d5 4s1
1
Q
Filling order
A
1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f
2
Q
Cu configuration
A
[Ar] 3d10 4s1
3
Q
Pauli’s Exclusion Principle
A
No two electrons can have the same Quantum Numbers
4
Q
Aufbau Principle
A
Build configurations in order
5
Q
Hund’s Rule
A
Fill all orbitals before moving on to the next level.
Chemistry
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