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

152 MBBS aspirants forged documents to block seats in Maharashtra; CET Cell issues notice
anam-khan

UP NEET UG Counselling 2025: DGME further revises round 3 schedule, registration ends tomorrow
anam-khan

MCC NEET UG 2025: 363 candidates 'convert' to NRI for round 3 MBBS admissions; seat matrix revised again

Latest Question