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Chemistry : Radicals & Chemical Symbols

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What is a Radical?

A radical is a group of atoms of elements, e.g., sulfate radical [SO₄]. Some common radicals and their chemical symbols are listed below.

Valency	Radical	Symbol	Ion
Monovalent [1]	Ammonium	NH₄	NH₄¹⁺
	Hydroxide	OH	OH^1-
	Nitrate	NO₃	NO₃^1-
	Bicarbonate	HCO₃	HCO₃^1-
	Bisulfite	HSO₃	HSO₃^1-
	Bisulfate	HSO₄	HSO₄^1-
Divalent [2]	Carbonate	CO₃	CO₃^2-
	Sulfite	SO₃	SO₃^2-
	Sulfate	SO₄	SO₄^2-
Trivalent [3]	Phosphate	PO₄	PO₄^3-

Practice Exercise for Chemistry Module on Chemical Symbols for Radicals - Basic

Practice Exercise for Chemistry Module on Chemical Symbols for Radicals - Advanced

Practice Exercise for Chemistry Module on Names of Polyatomic Ions - Advanced

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