Answer:
Mn
Step-by-step explanation:
The cation in the chemical formula MnSe is the Mn specie.
- A cation is a positively charge ion or radical.
- Such an ion has lost electrons and this leaves a net positive charge on them.
- The Mn is the cation
- Most metals forms cations as they readily lose electrons due to their large atomic radius.
- Se is the anion as it will carry a negative charge
- Most non-metals are anions