Ответ:
Fe₂(SO₄)₃ - Fe(III), S(VI), O(II)
B₂O₃ - B(III), O(II)
Ni₂S - Ni(I), S(II)
BaSiO₃ - Ba(II), Si(IV), O(II)
MgO - Mg(II), O(II)
Ag₂O - Ag(I), O(II)
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Ответ:
Fe₂(SO₄)₃ - Fe(III), S(VI), O(II)
B₂O₃ - B(III), O(II)
Ni₂S - Ni(I), S(II)
BaSiO₃ - Ba(II), Si(IV), O(II)
MgO - Mg(II), O(II)
Ag₂O - Ag(I), O(II)