It is yttrium III oxide.
The formula for the ionic compound formed between element Y and oxygen (O) would depend on the charges of the ions. If Y has a positive charge of +2 and O has a negative charge of -2 to form a stable compound, the formula would be Y2O2, simplifying to YO.
The compound name for SiI4 is tetrasilane.
The compound name of Al2O3 is aluminum oxide.
The compound name for ASO3 is arsenic trioxide.
The compound name of K4C is potassium carbide.
The ionic compound formed by reaction of the elements with atomic symbols K and O is named potassium oxide and has the formula unit K2O. (The lower case letters k and o are never proper atomic symbols!)
The formula for the ionic compound formed between element Y and oxygen (O) would depend on the charges of the ions. If Y has a positive charge of +2 and O has a negative charge of -2 to form a stable compound, the formula would be Y2O2, simplifying to YO.
The name of this compound is iodine heptafluoride.
Tetranitrogen tetraselenide is the name of the compound.
The compound name for SiI4 is tetrasilane.
The compound name for MnBr2 is manganese(II) bromide and the compound name for NaPO4 is sodium phosphate.
The name of the compound Cl2O3 is dichlorine trioxide.
The compound name of Mg3As2 is magnesium arsenide.
The compound name for S2F10 is disulfur decafluoride.
The name of the compound N2O4 is dinitrogen tetroxide.
The compound name for AgCl is silver chloride.
The compound name for TeCl2 is tellurium dichloride.