Question

What is the predicted order of first ionization energies from highest to lowest for aluminum, phosphorus, silicon, and sulfur?

Answer 1

the correct answer is D . (P > S > Si > Al)

Answer 2

This is the answer

P > S > Si > Al

Phosphorus is in group 15 and sulfur is in group 16 so the ionization energies is a little bit lower the phosphorus.