Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The electronic configuration of element A is 1s22s22p63s2 and of B is 1s22s22

The electronic configuration of element A is 1s22s22p63s2 and of B is 1s22s22p5. The formula of the compound is:

Option: 1

AB


Option: 2

A2B


Option: 3

AB2


Option: 4

A2B3


Answers (1)

best_answer

Classification of Elements : s-block -

  • The elements having ns1 and ns2 electronic configurations in their outermost shell are called s-block elements. 

  • Elements With ns1 configuration are called group 1 (alkali elements). 

  • Elements With ns2 configuration are called group 2 (alkaline earth elements).

  • They show fix valency and oxidation states. 

  • The loss of the outermost electrons(s) occurs readily to form M+ (in case of alkali metals) or M2+ ions (in case of alkaline earth elements). 

 

The outermost electrons of any element determine the valency of the element. Thus valency of A is 2 and that of B is 1. Thus, the formula of the compound is AB2.

Therefore, Option(3) is correct

Posted by

Sayak

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

BSEB Super 50 coaching application reopens tomorrow for JEE, NEET aspirants
anam-khan

Telangana to offer free JEE, NEET, CLAT coaching to government school students
anam-khan

BTech 2025 Admission LIVE: JoSAA revised schedule out on josaa.nic.in; updates on MHT CET, KEAM counselling

Latest Question