Which element has the same number of valence electrons as bromine (Br)?
3 answers
Chlorine (Cl).
Why are sodium (Na) and potassium (K) in the same group on the periodic table?
Why are sodium (Na) and potassium (K) in the same group on the periodic table? Responses They have similar reactivity. They have similar reactivity. They are both colorless. They are both colorless. They are both hard and brittle. They are both hard and brittle. They have similar atomic weights.