270937 A water molecule has two hydrogen atoms and one oxygen atom. CK 1 270816 Water contains hydrogen and oxygen. CK 270900 The atomic number for hydrogen is 1. xtofu80 270780 Water consists of hydrogen and oxygen. blay_paul 270899 Hydrogen and oxygen combine to form water. CK 268527 The treaty bans atomic bombs and hydrogen bombs. Nero 931539 A molecule of water is made up of one oxygen and two hydrogen atoms. FeuDRenais