Chemistry

Chemistry, 23.10.2020 22:30, paolacorazza

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.

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Which statement explains why calcium is classified as a Group 2 element?
A) A sulfur atom has...

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