Question

40. Explain followings - (a) Hund's Rule (b) Pauli's exclusion principle (c)Afbau principle (n+1) rule.​

Answer 1

Answer:

a) Pairing of one electron is done only after each orbital contains at least one electron of same spin.

b) According to this rule, no two electrons can have same set of all 4 quantum numbers.

c) Electrons are filled in increasing order of their energy.

like 1s< 2s <2p< 3s <3p <4s <3d