What is the oxidation number of chlorine in a ion?

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

What is the oxidation number of chlorine in a

\mathrm{ClO_3^-}

ion? (1)

-1

(2)

0

(3)

+3

(4)

+5