Question

why is duplet rule applied only in k-shell

Answer 1

Answer:

Only Hydrogen and Helium have just a K-shell so, they are the only elements that follow duplet rule. 1.) Hydrogen atoms have 1 electron in their K-shell naturally, if they gain one more electron, they will have 2 electrons.

Explanation:

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Answer 2

Answer:

the tendency for atoms to have 2 electrons in their outermost shell by interacting with other atoms through electron sharing or transfer is known as duplet rule. IF AN ATOM HAS 2 ELECTRONS IN ITS OUTERMOST SHELL THEN IT IS CALLED DUPLET RULE AND IF 8 ELECTRONS IN ITS OUTERMOST SHELL THEN IT IS CALLED OCTET RULE.