MCQ
$.........$ element has one electron in the outermost shell and attains duplet configuration after accepting one more electron and attains stability.
  • A
    Helium
  • Hydrogen
  • C
    Lithium
  • D
    Carbon

Answer

Correct option: B.
Hydrogen
Hydrogen has $1e^-$ in outermost shell, in order to achieve stability either $e^-$ to be removed or added.
When added it acquires a stable configuration forming duplet.

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