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Which of the following are example of polyatomic and monatomic ions respectively?

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Monatomic- $N {O_{2}}^{-}$ , Polyatomic- ${NH}_{4}^{+}$

Monatomic- ${NH}_{4}^{+}$ , Polyatomic- ${Na}^{+}$

Monatomic- ${Na}^{+}$ , Polyatomic- ${NH}_{4}^{+}$

Monatomic- ${OH}^{-}$ , Polyatomic- ${Cl}^{-}$

answer is A.

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Detailed Solution

Monoatomic ions are essentially substances that have either gained (positive) or lost (negative) electron/s.

For example, ${Na}^{+}$ represents a monatomic ion of sodium with a positive charge.

On the other hand, polyatomic ions have an electrical charge and two or more atoms that are covalently bonded.

One common example is the ammonium ion, ${NH}_{4}^{+}$ . The ammonium ion consists of a nitrogen atom bonded to four hydrogen atoms, and it carries a positive charge.

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