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son4ous [18]
3 years ago
10

Which is a polyatomic ion? A. O2– B. Mg2+ C. NH4+ D. Na+

Chemistry
2 answers:
lilavasa [31]3 years ago
7 0
C is the answer NH4+
Furkat [3]3 years ago
5 0
The answer would be ammonium: NH4+ (C.)
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