Coral reefs are considered organic because they were once made of living creatures. t or f

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )