Of the choices below, which gives the order for first ionization energies?
A) Ar Cl S Si Al
B) Al Si S Cl Ar
C) S Si Cl Al Ar
D) Cl S Al Ar Si
E) Cl S Al Si Ar

Question

Of the choices below, which gives the order for first ionization energies?
A) Ar > Cl > S > Si > Al
B) Al > Si > S > Cl > Ar
C) S > Si > Cl > Al > Ar
D) Cl > S > Al > Ar > Si
E) Cl > S > Al > Si > Ar

Quizplus · Accepted Answer

The first ionization energy generally increases across a period from left to right and decreases down a group. Argon (Ar) has the highest ionization energy, followed by chlorine (Cl), sulfur (S), silicon (Si), and aluminum (Al) in that order.

Of the Choices Below, Which Gives the Order for First