naming compounds: covalent compounds are identified using greek prefixes which are placed before the name of the element to show the number of atoms in a compound. these prefixes are mono 1, di 2, tri 3, tetra 4, penta 5, hexa 6, hepta 7, octa 8, nona 9, deca 10, but when first element in compound only has one element mono is emmited. example H20 dihydrogen monoxide. ionic are named with the metals name and by changing the end of the non metal to ide ex NaCl sodium chloride. although if it is a transition metal you must identify charge of metal with roman numeral ex MnCl4= Manganese (iv) Chloride