Question

The atom of which of the following elements forms dual closed shell configuration by receiving one electron ? (A) He (B) H (C) Li (D) B

GSEB - Class 9 Chapter - 4.Chemical Bonding Page 39

Answer 1

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It's (b) Hydrogen.

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Answer 2

(B) hydrogen because it have 1 electron by receiving one electron , it will have two electrons so it can form dual shell configuration