Description : Which is the most unreactive gas? -General Knowledge
Last Answer : Helium is the most unreactive element. This is Because Ionization energies for all the noble gases are large, but they get LARGER as you go up the noble gas column until you arrive at helium The most unreactive elements are ... (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).