give the symbols for 4 species that are isoelectronic with the selenide ion, Se2-

give the symbols for 4 species that are isoelectronic with the selenide ion, Se2-



Considering only ions with charges of +1 +2, -1 and -2 neutral atoms, give the symbols for 4 species that are isoelectronic with the selenide ion, Se2-





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