Write the symbols for the elements in the order mentioned in the name.
Write subscripts indicated by the prefixes. If the first part of the name has no prefix, assume it is mono-.
Prefixes tell you SUBscripts fro each element
Writing Formulas for Binary Covalent Compounds: Examples nitrogen dioxide NO 2 diphosphorus pentoxide P 2 O 5 xenon tetrafluoride XeF 4 sulfur hexafluoride SF 6 * Second element in ‘ide’ from mono 1 * Drop –a & -o before ‘oxide’ deca 10 nona 9 octa 8 heptaa 7 hexa 6 penta 5 tetra 4 tri 3 di 2