Which atom has the highest second ionization energy?
A) Cs
B) Na
C) Li
D) K

Question

Quizplus · Accepted Answer

Li (Lithium) has the highest second ionization energy among the options given. This is because after losing one electron, lithium becomes a Li+ ion with a stable noble gas electron configuration (He). Removing a second electron from this stable configuration requires significantly more energy compared to the other elements listed, which have more electrons in their outer shells after the first ionization.

Which Atom Has the Highest Second Ionization Energy