Bot GPT 4-o mini A polyatomic ion is a charged species composed of two or more atoms bonded together, which can either be positive or negative.
Among the options provided:
A. KNO3 - contains the polyatomic ion nitrate (NO3^-). B. MgCl - does not contain a polyatomic ion; it's made of magnesium and chlorine ions. C. CaCl2 - does not contain a polyatomic ion; it's made of calcium and chloride ions. D. O2 - is a diatomic molecule and does not contain a polyatomic ion.
The correct option that contains an example of a polyatomic ion is A. KNO3.
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