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Bonding of Atoms in Reactions Quick Check

3 of 53 of 5 Items

Question
Which option contains an example of a polyatomic ion?(1 point)
Responses

MgCl
MgCl

CaCl2
CaCl 2

O2
O 2

KNO3

1 answer

The option that contains an example of a polyatomic ion is KNO3 (potassium nitrate). This compound includes the nitrate ion (NO3^-), which is a polyatomic ion. The other options either represent binary compounds or diatomic molecules, which do not contain polyatomic ions.

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