Why do noble gases hardly ever react?
Quick Answer
Noble gases are very unreactive because their outer electron shells are already full. That stable electron arrangement makes them reluctant to gain, lose, or share electrons.
The Full Story
Noble gases such as helium, neon, argon, krypton, xenon, and radon sit in Group 18 of the periodic table. Helium has a full first shell with 2 electrons, and the others have full valence shells with 8 electrons, which makes them especially stable. Because they already have favorable electron configurations, they do not easily form compounds under normal conditions. A few noble-gas compounds, especially involving xenon, were discovered in the 20th century, but they are exceptions rather than the rule.
Key Facts
YouTube Angle
Suggested video title for this topic:
"The elements that mostly mind their own business: noble gases."
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.