Question

which chemical formula represents a polyatomic ion? (1
o nacl
o na+
o cio-
o ci-

Explanation:

A polyatomic ion is an ion composed of more than one atom.

• \(NaCl\) is a compound, not an ion.
• \(Na^{+}\) is a monatomic ion (composed of one atom).
• \(ClO^{-}\) is composed of two atoms (\(Cl\) and \(O\)) and has a charge, so it is a polyatomic ion.
• \(Cl^{-}\) is a monatomic ion.

Answer:

\(ClO^{-}\)