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Identify a molecule which does not exist...

Identify a molecule which does not exist.

A

`Li_2`

B

`C_2`

C

`O_2`

D

`He_2`

Text Solution

Verified by Experts

The correct Answer is:
D
For `He_2` molecule
Electronic configuration is alsotis`sigma1s^2,sigma^(**) 1s^2`
`B.O =1/2(N_b-N_a)`
`=1/2(2-2)`
= 0
The bond order comes out to be zero. This indicates that there is no bond formation between 2 He atoms and hence the He, molecule does not exist.
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