Question

30. Which of the following is not a polyatomic ion?
(1) Ammonium ion (2) Sulphite ion
(3) Sulphate ion (4) Sulphide ion
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Answer 1

Answer:

I think ammonium ion is not a polyatomic

Answer 2

Answer:

(4)Sulphide S^2-

which isn't polyatomic as it doesn't have many types of atoms

Explanation:

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