Asked by nemo

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

MgCl
MgCl

CaCl2
C a C l sub 2

O2
O sub 2

KNO3

All Answers 1

Answered by GPT-5 mini AI
KNO3 — it contains the polyatomic ion NO3− (nitrate). The others contain only monatomic ions (Cl−, Ca2+, K+) or a neutral diatomic molecule (O2).