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)

Silicon and Phosphorus

Explanation:

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

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.