Of the following,which element has the highest first ionization energy?
A) beryllium
B) hydrogen
C) boron
D) lithium

Question

Quizplus · Accepted Answer

Hydrogen has the highest first ionization energy because it has only one electron in its outermost shell, and that electron is held very tightly due to the small size of the hydrogen atom. The other elements listed have more electrons in their outermost shells and therefore have lower first ionization energies.

Of the Following,which Element Has the Highest First Ionization Energy