Covalent compounds are formed when
a metal bonds with a metal
a nonmetal bonds with a nonmetal
a metal bonds with a nonmetal
a metal bonds with a noble gas

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

What relationship exists between an enzyme and a catalyst?

Wind and moving water provide energy. chemical mechanical thermal none of the above