Question

which set correctly orders the atoms from highest to lowest ionization energy? ar > s > p > al s > p > al > ar ar > al > p > s al > p > s > ar

Explanation:

Step1: Recall ionization - energy trend

Ionization energy generally increases across a period from left - to - right. Noble gases have the highest ionization energies in a period because they have a full valence shell.

Step2: Analyze the given elements

Ar is a noble gas among Al, P, S, and Ar. So Ar has the highest ionization energy. Among Al, P, and S, S has a higher ionization energy than P due to the general trend, and P has a higher ionization energy than Al.

Answer:

Ar > S > P > Al