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Question

________ element has one electron in the outermost shell and attains duplet configuration after accepting one more electron and attains stability.
  1. Helium
  2. Hydrogen
  3. Lithium
  4. Carbon

A
Lithium
B
Carbon
C
Helium
D
Hydrogen
Solution
Verified by Toppr

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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