Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Which of the following elements has the outermost 2s1  configuration? Option: 1 Na <s

Which of the following elements has the outermost 2s1  configuration? 

Option: 1

Na 


Option: 2

He 


Option: 3

Li 


Option: 4

K 


Answers (1)

best_answer

The electronic configuration of the elements are - 

Li\rightarrow 1s^{^{2}}2s^{1}or\ [He]2s^1

Ne\rightarrow 1s^{^{2}}2s^{2}2p^{6}

Na\rightarrow 1s^{^{2}}2s^{2}2p^{6}3s^{1} or [Ne]3s^{1}

K\rightarrow 1s^{^{2}}2s^{2}2p^{6}3s^23p^64s^1\ or \ [Ar]4s^1
The correct answer is option 3. 

 

 

Posted by

Rishi

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

Students protest in Latur, accuse Dipke of leaving NEET struggle midway, moving on to other issues
anam-khan

NEET 2027: Education minister reviews NTA exam readiness ahead of CBT infrastructure shift
anam-khan

NEET 2027 in Online Mode: Centre preparing CBT infrastructure strategy for future exams

Latest Question