Electron occupies the available orbital singly before pairing in any one orbital occurs, it is [CBSE PMT 1991]

Electron occupies the available orbital singly before pairing in any o

1.	Electron occupies the available orbital singly before pairing in any one orbital occurs, it is [CBSE PMT 1991]
A.	Pauli's exclusion principle
B.	Hund's Rule
C.	Heisenberg's principle
D.	Prout's hypothesis
Answer» C. Heisenberg's principle

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Electron occupies the available orbital singly before pairing in any one orbital occurs, it is [CBSE PMT 1991]

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