Write the name for each ionic compound. Write the name for Na2Se, MgF2, AgI, CO2S3

The names for the given ionic compounds are:

- Na2Se: Sodium selenide
- MgF2: Magnesium fluoride
- AgI: Silver iodide
- CO2S3: This is not an ionic compound. It appears to be a covalent compound consisting of the elements carbon, oxygen, and sulfur.