Which of the following pairs of elements would have the most similar properties?
A.Hydrogen (H) and Helium (He) because they are both gasses
B.Sodium (Na) and Potassium (K) because they have similar reactivity
C.Antimony (Sb) and Silicon (Si) because they are both metalloids
D.Aluminum (Al) and Magnesium (Mg) because they are both silver