Nctzens and kpoppies answer this question i need friends,, locals get out thanks

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.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.