aliba accidently stood on a drawing pin and immediately lifted her foot. what was the stimulus in this action!?​

bc blah

explanation:

bc blah

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.

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i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!