Radon the heaviest and at the same time the only radioactive noble gas. It is a decay product of naturally occurring uranium or thorium and dissolves out of the ground into the atmosphere, where it aggregates in caves or cellars. Even though the element is radioactive, it is supposed to have healing qualities. There are even official spas that offer radon baths as a form of therapy. The medicinal benefit is disputed.

Argon is a noble gas. That means, it doesn’t form any compounds with other elements. Air naturally contains about 1% of argon. A scientist once calculated, that with every breath you breathe a few argon-atoms, that any person in the world has already inhaled before – alive or dead.

Argo the monster really lives up to his name: It means inert. So he likes to float lazyly around and meditate the whole day. Every once in a while he utters some very wise words.

When speaking of neon, everybody thinks of neonlight. But most of the „neon tubes“ contain mercury vapor. Neon glows red.

The name simply means „new“. So Neo the monster likes everything new and cool. He doesn’t like to get his hands dirty and prefers others to do the work.