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Write the symbols for the ions, and the correct formula for the ionic compounds formed by each of the following:
a) barium and iodine
b) gallium and selenium
c)sodium and nitrogen
d) cadmium and sulfur
symbol for the cation | symbol for the anion | formula for the ionic compound | |
a) barium and iodine | Ba2+ | I- | ![]() |
b) gallium and selenium | Ga2+ | Se2- | GaSe |
c)sodium and nitrogen | Na+ | N3- | ![]() |
d) cadmium and sulfur | Cd2+ | S2- | CdS |
Note that Barium (Ba), Cadmium(Cd) , Gallium (Ga) for + 2 ions.
Sodium form Na+ ion.
Similarly, Iodine form I-, Se and S form 2- anion and Nitrogen forms N3-.
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