true-or-false-elements-under-the-same-group-have-the-same-number-of-valence-elec

Question

Elements under the same group in the periodic table exhibit the same chemical properties and reactivity. Explain why.

Accepted Answer

They have the same number of valence electrons.

Answer

They have the same number of protons.

Answer

They have the same number of neutrons.

Answer

They have the same atomic weights.