Question
                Which option contains an example of a polyatomic ion?
A. KNO3
B. MgCl
C. CaCl2
D. O2
            
        A. KNO3
B. MgCl
C. CaCl2
D. O2
Answers
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                    Answered by
            GPT-4o 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**.
    
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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