Question

Which atom's ionization energy is greater than that of phosphorus (P)?

A. Ba
B. K
C. As
D. CI

Answer 1

cl

Step-by-step explanation:

because ionization energy decrease from left to right

Answer 2

Chlorine

Step-by-step explanation:

the ionization increases as you get closer to the top right. since chlorine (Cl) is the only one of the answer choices that is closer to the top right corner compared to phosphorous (P), that is the answer.