one valence electron. two valence electrons. seven valence electrons. eight valence electrons.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The alkaline earth metal elements are in the same family in the periodic table because they all have
Possibilities:
- one valence electron.
- two valence electrons.
- seven valence electrons.
- eight valence electrons.

two valence electrons.