which is a polyatomic ion with 2 units of positive charge
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Answer:
A polyatomic ion is an ion composed of more than one atom. The ammonium ion consists of one nitrogen atom and four hydrogen atoms. Together, they comprise a single ion with a 1+ charge and a formula of NH+4. The carbonate ion consists of one carbon atom and three oxygen atoms, and carries an overall charge of 2−.
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Explanation:
Polyatomic Ions
A polyatomic ion is an ion composed of more than one atom. The ammonium ion consists of one nitrogen atom and four hydrogen atoms. Together, they comprise a single ion with a 1+ charge and a formula of NH+4 . The carbonate ion consists of one carbon atom and three oxygen atoms, and carries an overall charge of 2− . The formula of the carbonate ion is CO2−3 . The atoms of a polyatomic ion are tightly bonded together, and so the entire ion behaves as a single unit. The figures below show several models.