In general, do metals or nonmetals from the same period have higher
ionization energies? Why?
(A) Metals have higher ionization energies because they usually have
more protons than nonmetals.
(B) Nonmetals have higher ionization energies because they are larger
than metals and harder to ionize.
(C) Metals have higher ionization energies because there is less electron
shielding than there is in nonmetals.
(D) Nonmetals have higher ionization energies because they are closer to
having filled a complete energy level.
