Question

Why do elements in the same group or column of the periodic table have similar properties? A. They have the same number of protons. B. They have the same number of electron shells. C. They have the same number of neutrons. D. They have the same number of outer shell electrons.

Answer 1

Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level (outer shell) .
Hope this helps @maybubble :P

Answer 2

Thanks!

Answer 3

you're welcome :D