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Q.

Which of the following rules could explain the presence of three unpaired electrons in N-atom?

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a

Hund's rule

b

Aufbau's principle

c

Heisenberg's uncertainty principle

d

Pauli's exclusion principle

answer is A.

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Detailed Solution

The presence of three unpaired in Nitrogen can be explained by Hund rule. Since the outermost shell is the P shell and P shell has 3 orbitals each of these orbitals can accommodate 2 electron. Then each of these 3 electron occupies one orbital and remain unpaired.

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