Use a periodic table to choose the pair of elements whose properties are
most similar.
A. silicon (Si), phosphorus (P)
B. neon (Ne), sulfur (S)
C. potassium (K), magnesium (Mg)
D. chlorine (CI), iodine (I)
They are right next to each other and would have the closest similarities in the case of: Atomic Weight, Density, Oxidation States, Phase, Period, and their Atomic radius
