Which of the elements listed below has the highest first ionization energy
A) C
B) Ge
C) P
D) O
E) Se

Question

Quizplus · Accepted Answer

Oxygen (O) has the highest first ionization energy among the options given. This is because it is located furthest to the right and top of the periodic table, where ionization energy generally increases due to higher nuclear charge and smaller atomic radius, making it more difficult to remove an electron.

Which of the Elements Listed Below Has the Highest First