Is there any difference in the time of sunrise during summer ans winter?​

yes winter time sunrise exactly time but winter time you can't see sun

depends on if you on plato or not

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.