The chemicals considered noble gases belong to Group 18 of the periodic table and include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Noble gases are characterized by their stable electron configurations, which make them inert and resistant to chemical reactions under standard conditions. Their lack of reactivity makes them useful in various applications, such as lighting (neon lights), inert atmospheres for chemical reactions, and cryogenics.