Question #6c7ec

1 Answer
anor277
Apr 6, 2016

Ca(NO_3)_2

Explanation:

Calcium nitrate is composed of Ca^(2+) and NO_3^- ions. To form an electrically neutral species, clearly I must take 2 nitrate anions per calcium dication.

How do you know that calcium metal forms a Ca^(2+) ion? Look at the Periodic Table. Calcium, an alkaline earth, is in Group II (i.e. the vertical column). If it is in Group II it has 2 valence electrons, as does Be, and Sr, and Ba.

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