Fe plus S FeS?

Yes, if the iron ion is iron(II), which means it has a charge of 2+. FeS is called iron(II) sulfide. If the iron ion is iron(III), with a charge of 3+, then the formula unit would be Fe2S3, and would...

The balanced equation for iron (fe) and sulphar(s) is ( fe + s = fe2s )

When CS2 is added to reaction mixture Fe + S = FeS , it would dissolve the excess 'S' leaving the solids Fe and FeS without any change.

Fe3+ is smaller. Its ionic radius is 63 pm, while Fe2+ has an ionic radius of 77 pm. (For comparison, the Fe atom has a radius of 140 pm.) This is because the outermost electron in the 2+ ion is...

Iron(II)+