According to the explanation given in the previous session, now we have three new ionic compounds:
1. Silver phosphide will have the chemical formula: Ag3P, 3 is subscript
2. Radium phosphate will have the chemical formula: Ra3(PO4)2, numbers 3, 4 and 2 are all subscripts
3. Gallium iodide will have the chemical formula: GaI3, 3 is subscript
