Chemistry
Grade-9
Easy

Question

A noble gas whose outermost electronic configuration is different from other group members?

  1. Og
  2. Cp
  3. He
  4. Ne

hintHint:

He has two electrons in their outermost shell.

The correct answer is: He


    • All the noble gases have eight electrons in the outermost shell in general.
    • Only He has two electrons in the outermost shell as its outermost orbital is s orbital whose maximum electron holding capacity is two.
    • Hence, He is different from other noble gases. 

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