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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.

Respuesta :

queenbee1213

Answer:

A

Explanation:

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

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