Hydrogen is not a noble gas. Only the elements in the farthest right-hand column of the Periodic Table of Elements are noble gases. They are the gases whose outer energy levels are completely full. They cannot bond with other elements because of this. The electrons ( which starts out equivalent to the protons-- atomic number), circle the nucleus in energy levels. The first energy level can hold only two electrons. Any after that will hold up to eight. If the outer energy level ( valence) is full, it is called a noble gas and cannot bond with other elements. If the outer energy level is half full, they can share electrons with another atom; if the valence is more than half full, but not full, they gain electrons, and if it is less than half full, they lose electrons. The noble gases ( inert gases is another name for them) are: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn). Hope this helps!
