Answer:
The elements that can have multiple charges are;
1. Gold; gold (I) gold (III),
2. Mercury; mercury (I) mercury (II)
3. Ag; silver (I) silver (II) silver (III)
4. W; tungsten 0, tungsten (I)... tungsten (VI)
5. nickel, nickel 0 nickel (I)... nickel (IV)
Explanation:
Transition metals are the 38 elements that have partially filled or can form partially filled d-orbitals. Elements of the transition metals can have multiple oxidation states by having more than one ionic state which thus requires the specification of the ionic state in a compound by Roman numerals such as Fe²⁺ and Fe³⁺ specified as iron (II) and iron (III) respectively
Elements included as transition metals includes, nickel, Ni, tungsten, W, Silver, Ag, Gold, Au, Mercury, Hg.