Chemical Formulae There are 3 different types of bonding, namely ionic bond, covalent bond, and metallic bond. For ionic compounds, the nonmetals once become a negative ion, they undergo name change. The last part of their name changed to -ide Nonmetal oxygen fluorine sulfur nitrogen Name after becomes an anion (negative ion) Oxide Fluoride Sulfide Nitride For polyatomic ion, we need to memorize Name of polyatomic ion Ammonium ion Nitrate ion Hydroxide ion Sulfate ion Carbonate ion Chemical formulae ππ»4+ ππ3− ππ» − ππ42− πΆπ32− There are other covalent compounds that we need to memorize as well Name of covalent compounds Water Ammonia Methane Ethene Chemical formulae π»2 π ππ»3 πΆπ»4 πΆ2 π»4 Prefixes are introduced in covalent compounds to signify the number of the atoms involved in the compound Prefix 1 2 3 4 Number of atoms involved Mono Di Tri Tetra Example, carbon monoxide CO, carbon dioxide CO2, sulfur trioxide SO3, carbon tetrachloride CCl4.
