During what time does the valley breeze occur

hello there are no statements below!

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.

the question isn't complete here so i can't right an answer '_'

i dont know it at allnow im just getting points at this pint