Question

How does the halogens and alkali attain stable configuration respectively?

• A. Gain electrons ; Gain electrons
• B. Gain electrons ; Lose electrons
• C. Lose electrons ; Gain electrons
• D. Lose electrons ; Lose electrons

Answer 1

Answer: (B)

Gain electrons ; Lose electrons

Halogens gains an electron to complete an octet whereas alkali loses an electron to empty the shell-forming stable ion.

For example

$F+e^{-}\to F^{-}$ gain of electron

$Na\to N{a}^{+}+e^{-}$ lose of electron