Re: My favourite
I looked up noble gases on Wikipedia. Let us assume that atomic radius is a measure of how easy it is for a gas to leak out of a container. I was surprised to find that neon, at radius 38, is not much bigger than helium, at radius 31. This is despite neon being much "bigger" in terms of atomic number: 10 versus 2. Argon, the next noble gas after neon, has atomic radius 71, which is significantly bigger.
Biting the hand that feeds IT
