Question

Which of the following processes requires maximum energy

• A. $Mg\left(g\right) \, \rightarrow \, \left(M g\right)^{+}\left(g\right)+e^{-}$
• B. $\left(M g\right)^{+}\left(g\right) \, \rightarrow \left(M g\right)^{+ 2}\left(g\right)+e^{-}$
• C. $Na\left(g\right) \rightarrow \, \left(N a\right)^{+}\left(g\right)+e^{-}$
• D. $\left(N a\right)^{+}\left(g\right) \rightarrow \left(N a\right)^{2 +}\left(g\right)+e^{-}$

Answer 1

Answer: (D)

$N a^{+}$ has stable electronic configuration (1s²,2s²2p⁶). If remove extra electrone that is present in inner shell, so need more energy to remove it.(insufficient amount of energy)