Question

bonding of atoms in reactions quick check 3 of 5 which option contains an example of a polyatomic ion? (1 point) kno₃ cacl₂ mgcl o₂

Explanation:

A polyatomic ion is an ion composed of more than one atom. In \(KNO_3\), the \(NO_3^-\) (nitrate) is a polyatomic ion. \(CaCl_2\) has \(Ca^{2 +}\) (calcium ion) and \(Cl^-\) (chloride ion, monatomic). \(MgCl\) is not a correct formula (should be \(MgCl_2\) with \(Mg^{2+}\) and \(Cl^-\)). \(O_2\) is a molecule, not an ion.

Answer:

\(KNO_3\)