Question

relative electronegativity quick check
which chemical formula represents a polyatomic ion? (1 point)
cl-
nacl
na+
clo-

Explanation:

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

• \(Cl^-\) is a monatomic ion (composed of only one atom, chlorine).
• \(NaCl\) is a compound (sodium chloride), not an ion.
• \(Na^+\) is a monatomic ion (composed of only one atom, sodium).
• \(ClO^-\) (hypochlorite ion) is composed of two atoms (chlorine and oxygen), so it is a polyatomic ion.

Answer:

\(ClO^-\)