Question

Which electronic configuration of an element has abnormally high difference between $2^{nd}$ and $3^{rd}$ I.E.?

• A. 1s², 2s², 2p⁶, 3s¹
• B. 1s², 2s², 2p⁶, 3s², 3p¹
• C. 1s², 2s², 2p⁶, 3s², 3p²
• D. 1s², 2s², 2p⁶, 3s²

Answer 1

The correct option is D

1s², 2s², 2p⁶, 3s²

An element which attains inert gas configuration after losing 2 electrons will have abnormally high difference between $2^{nd}$ and $3^{rd}$ I.E.