Question

Which half-reaction correctly represents reduction?
1. Ag→Ag⁺+e⁻
2.F₂→ 2F⁻ + 2e⁻
3.Au³⁺3e⁻→ Au
4.Fe²⁺+e⁻→ Fe³⁺

Answer 1

first and third one is true answer I believe. Is Aurum in third one 3+? Metals cant be -