A genetic characteristic that allows an organism to survive and reproduce.

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.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

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