Chemistry Chap 5 Naming Compounds

Naming Compounds - Ionic Binary Compounds – compounds containing only 2 elements To name: Write name of elem w/ (+) charge Add name of (-) elem (ion) Must end in i-d-e Example: AlN - aluminum nitride

Naming Compounds - Ionic If elem has more than 1 oxidation #, must write the oxid # of the (+) ion after the name of the element Use Roman numerals in ( )

Naming Compounds - Ionic Not all comps ending in i-d-e are binary NaOH - sodium hydroxide When naming comps w/ an elem & a polyatomic ion or 2 polyatomic ions, name (+) ion first then (-) ion. Do not change the ending of the polyatomic ion.

Naming Compounds - Molecular Some comps are named by an older syst which used prefixes instead of oxid #’s Usually used if both elems are nonmetals Binary Molecular Compounds Rules If only 1 atom of 1st elem is needed , no prefix used If more than 1 atom is needed, use a prefix Always use a prefix for 2nd elem End in I-d-e

Examples of binary molecular compounds CO – carbon monoxide CO2 – carbon dioxide CS2 – carbon disulfide N2O5 - dinitrogen pentoxide