Saat 10:20 den 9:50 yi çıkartırsak kaç kalır acil​

okay I think your talking about time lol and its Wednesday March 17, St Patrick's day and hahahah

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.

a physical change is being made.