Which of the following elements has the largest first ionization energy?
A)Na
B)Cl
C)Ca
D)Te
E)Br

Question

Quizplus · Accepted Answer

First ionization energy generally increases across a period from left to right in the periodic table due to increasing nuclear charge and decreases down a group due to increasing atomic size. Among the given options, chlorine (Cl) is the furthest to the right and top, indicating it has the highest first ionization energy.

Which of the Following Elements Has the Largest First Ionization