This video shows how the 92 naturally occurring kinds of atoms are listed from the lightest, hydrogen, to the heaviest, uranium, on the Periodic Table. The table's 7 rows and 18 groups are explained, as well as the table's division into metals and non-metals. Because Atomic Number is not...

Watch how two hydrogen atoms collide and stick together to make a hydrogen molecule, H2. See how hydrogen atoms collide and chemically bond with oxygen to form water, H2O, with nitrogen to form ammonia, NH3, and with carbon to form methane, CH4. The chemical formula of these substances are...