iron sulphide, iron(II) sulphide or ferrous sulphide.
Iron sulphide is ambiguous however and could refer to any one of a range of iron sulphur compounds,including Fe3S4 and Fe2S3
If the formula was intended to be PCl5, the compound is phosphorus pentachloride.
The Correct Chemical Name is: xenon tetrafluoride
dialuminium trisulphide?
The correct name for the compound FeCl3 is iron(III) chloride.
There are two atoms in the compound FeS: Sulfur and iron.
iron.
Iron (II) sulfide
The correct name for the compound PCI is phosphorus trichloride.
The correct compound name for AlF3 is aluminum fluoride.
The correct compound name for BaO is barium oxide.
The correct name of the compound N2O4 is dinitrogen tetroxide.
The correct name for the compound S3Cl2 is disulfur dichloride.
The correct name for the compound CS2 is carbon disulfide.
The correct name for the compound NCl3 is nitrogen trichloride.
The correct name for the compound K2S is potassium sulfide.
FES is referred to as a compound because it is a chemical substance composed of two or more elements in a fixed ratio. In the case of FES, it is composed of iron (Fe) and sulfur (S) atoms in a specific stoichiometric ratio, which gives it the chemical properties unique to the compound.
The correct name for HgO compound is mercury(II) oxide.