[quote

ost_uid0="SBYRD5"]Three chemical elements that are nonmetals=
Carbon monoxide(CO2)
Silicate
H2O(Water)[/quote]
erm incase you havent noticed there not elements, and there are more than 3 non metal elemnts, i dont know all of them but some are, oxygen, hydrogen, argon, bromine and phosphorous, and i dont know how u got it wrong cos its some of the first stuff you learn in chemistry