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Fynjy0 [20]
3 years ago
14

Which of the following ions is a polyatomic ion?

Chemistry
1 answer:
nlexa [21]3 years ago
4 0
Among the choices, the polyatomic ion is only the third choice, NH4+ where it is composed of nitrogen one atom of nitrogen and 4 atoms of hydrogen. Choice 2 is a monoatomic atom being composed only of calcium. Then, the first and fourth choices are not ions because they are not charged.
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