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The number of unpaired electrons present in the first excited state of chlorine atom is: A 1 B 3 C 5 D 2

The number of unpaired electrons present in the first excited state of chlorine atom is:

A

1

B

3

C

5

D

2

 

Grade:12

1 Answers

Mayank Ranka
askIITians Faculty 277 Points
3 years ago

The number of unpaired electrons present in the first excited state of the chlorine atom is 3. The electronic configuration of chlorine is [Ne]3s23px2​3py2​3pz1​. Thus, it contains 1 unpaired electron. In the first excited state, 1 electron is transferred from 3p to 4s orbital. The electronic configuration becomes [Ne]3s23px2​3py1​3pz1​4s1 Thus, three unpaired electrons are present in the excited state.

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