Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Identify the molecule which does not exist.Option: 1  <

Identify the molecule which does not exist.

Option: 1

O_{2}
 


Option: 2

He_{2}


Option: 3

Li_{2}

 


Option: 4

C_{2}


Answers (1)

best_answer

The electronic configuration of the molecules are:

O_{2}- \sigma 1s^{2}\sigma ^{*}1s^{2}\sigma 2s^{2}\sigma ^{*}2s^{2}\sigma 2p_{z}^{2}\pi 2p_{x}^{2}=\pi 2p_{y}^{2}\pi^{*} 2p_{x}^{1}=\pi^{*} 2p_{y}^{1}\quad BO=\frac{10-6}{2}=2

He_{2}- \sigma 1s^{2}\sigma ^{*}1s^{2}\sigma 2s^{2}\sigma ^{*}2s^{2}\quad BO=\frac{4-4}{2}=0

Li_{2}- \sigma 1s^{2}\sigma ^{*}1s^{2}\sigma 2s^{2}\quad BO=\frac{4-2}{2}=1

C_{2}- \sigma 1s^{2}\sigma ^{*}1s^{2}\sigma 2s^{2}\sigma^{*}2s^{2}\pi 2p_{x}^{2}=\pi2p_{y}^{2}\quad BO=\frac{8-4}{2}=2

The bond order of the He2 molecule is zero and hence it does not exist

Therefore, Option(2) is correct.

Posted by

rishi.raj

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

Karnataka NEET UG merit list 2025 out; 87,909 to take part in MBBS, BDS, AYUSH counselling
anam-khan

‘Will affect lakhs of candidates’: Supreme Court, HC refuse NEET UG 2025 re-exam, result revision pleas
anam-khan

No NEET UG 2025 re-test for MP candidates as high court stays single judge order

Latest Question