Question

which of the following elements does not form more than one ion? au pb ni zn

Explanation:

• Au (Gold): Can form \(Au^{+}\) and \(Au^{3 +}\) ions.
• Pb (Lead): Can form \(Pb^{2+}\) and \(Pb^{4+}\) ions.
• Ni (Nickel): Can form \(Ni^{2+}\) and \(Ni^{3+}\) ions.
• Zn (Zinc): Only forms \(Zn^{2+}\) ion.

Answer:

Zn