TiS for titanium sulfide (titanium(II) sulfide)
and
TiS2 for titanium disulfide (titanium(IV) sulfide)
The chemical formula for titanium (II) phosphite is Ti3(PO3)4. In this compound, titanium has a +2 oxidation state, denoted by the Roman numeral II in parentheses. Phosphite is a polyatomic ion with the formula PO3, and the subscript 4 indicates that there are four phosphite ions in the compound.
titanium (II) selenide = SeTi
TiO is the formula of titanium (II) oxide
Titanium dioxide, also known as titanium(IV) oxideor titania, is the naturally occurring oxide of titanium, chemical formula TiO2.
The chemical name for Co3(PO4)2 is cobalt(II) phosphate.
The chemical formula for titanium (II) phosphite is Ti3(PO3)4. In this compound, titanium has a +2 oxidation state, denoted by the Roman numeral II in parentheses. Phosphite is a polyatomic ion with the formula PO3, and the subscript 4 indicates that there are four phosphite ions in the compound.
titanium (II) selenide = SeTi
TiO is the formula of titanium (II) oxide
Titanium dioxide, also known as titanium(IV) oxideor titania, is the naturally occurring oxide of titanium, chemical formula TiO2.
The chemical name for Co3(PO4)2 is cobalt(II) phosphate.
The formula for titanium(II) selenide is TiSe.
The chemical formula for lead phosphate is Pb3(PO4)2
Almost certainly you are looking for Titanium(IV) Selenide, TiSe2, though the Titanium(III) compound, Ti2Se3 may exist as well. You should be more specific :)
The formula you provided, TiNO3₂, represents titanium nitrate.
The chemical formula for iron(II) hydride is FeH2.
The chemical formula of copper (II) carbonate is CuCO3.
The chemical formula of nickel(II) nitride is Ni3N2.