text: naming molecular compounds? i need some help w/ these molecular compounds, i can't figure out their name. plez help  1. sf6 - sulfur fluoride? 2. n2o5 - nitric oxide? 3. nf3 - nitric fluoride? 4. p2s3 - phosphorus trisulfide? your names would be: sf6 --> sulfur hexaoxide  n2o5--> dinitrogen pentaoxide nf3 ---> nitrogen trifluoride p2s3 ---> diphosphorus trisulfide  all of these are covalently bonded (nonmetal+nonmetal, non-ionic compounds) and are binary (made of two elements), hence, you would use the numerical prefixes for both elements, (mono-, di-, tri, tetra-, etc.)  and the -ide suffix for the ending element. note: you ususally don't use the mono- prefix in the first element of the compound if there is only one the compound. for example, you wouldn't say monosulfur hexaoxide (sf6) nor would you say monocarbon monoxide (co).