Question

Which statement explains why calcium is classified as

a Group 2 element?
A) A sulfur atom has 2 valence electrons.
B) A sulfur atom has 20 neutrons.
C) Calcium is a grey solid at STP.
D) Calcium reacts with most non-metals.

Answer 1

A

Step-by-step explanation:

This group includes beryllium, magnesium, calcium, strontium, barium, and radium. All group 2 elements have two valence electrons