Which of the following elements has the highest second ionization energy?
- Li
- Be
- B
- C
📝 Batafsil tushuntirish
Lithium (Li) has a configuration of 1s² 2s¹.The first electron is easily removed from the 2s orbital.
The second electron must be removed from the stable, full 1s² shell, which requires a massive amount of energy.