Hydrogen and Helium

Hydrogen is the first element on the Periodic Table. It is most commonly found mixed in our atmospere, and it us also a part of water. Our sum is also mostly hydrogen.


Helium is the 2nd element of their periodic table. Helium is used to fill up balloons and blimps and allow them to float because it is lighter than air. It is also used as a shield in arc welding. It also is used on diver’s tanks to balance out there oxygen.