Because these gases have the valence electron shell completely filled and they are very unreactive.
Helium, Neon, Argon, Krypton, Xenon, Radon, Ununoctium
Helium, Neon, Argon, Krypton, Xenon, Radon, Ununoctium
Helium, Neon, Argon, Krypton, Xenon, Radon, Ununoctium.
helium, neon, argon, krypton, xenon, radon, ununoctium
helium, neon, argon, krypton, xenon, radon, ununoctium
Helium, neon, krypton, xenon, radon and ununoctium.
Noble gases include Neon, Argon, Krypton, Xenon, Radon, Helium, and ununoctium.
The noble gases group includes helium, neon, argon, krypton, xenon, and radon. These elements are known for their stability due to their full outer electron shells, which makes them generally unreactive.
Noble gases family contain: helium, neon, argon, krypton, xenon, radon and ununoctium.
Noble gases include Neon, Argon, Krypton, Xenon, Radon, Helium, and ununoctium.
Helium Neon and Argon The noble gas group contain: helium, neon, argon, krypton, xenon, radon, ununoctium.
Noble gases include Neon, Argon, Krypton, Xenon, Radon, Helium, and ununoctium.