Question

Elements in Group IIA (also known as Group 2, or the alkaline earth metals) have similar properties because they all have the same number of ____

(multiple choice)

A. valence electrons
B. electrons
C. electrons needed to fill their octet
D. electron shells​

Answer 1

Electrons in their outer shell

Step-by-step explanation:

They have similar properties they have the same number of electrons in their outermost shell.