Which of the following reasons explains why sulfur (S) will have larger ionization energy than aluminum (Al)? A. Sulfur experiences less electron shielding than aluminum.
B. Sulfur has larger protons and thus, can hold its electrons more tightly.
C. Sulfur has more protons in its nucleus and thus, holds its electrons more tightly.
D. Sulfur has fewer protons in its nucleus and thus, holds its electrons loosely.