Which equation shows the formation of a Group 1 metal ion?
M\text{M}M represents a Group 1 metal and e−\text{e}^-e− represents an electron.
M+e−→M+\text{M} + \text{e}^- \rightarrow \text{M}^+M+e−→M+
M+e−→M−\text{M} + \text{e}^- \rightarrow \text{M}^-M+e−→M−
M→M++e−\text{M} \rightarrow \text{M}^+ + \text{e}^-M→M++e−
M→M−+e−\text{M} \rightarrow \text{M}^- + \text{e}^-M→M−+e−