Radon is a noble gas. In general gases are considered thin/low viscosity.
In the gaseous (normal) state, radon is a colorless gas, as is true of all noble gases (see: xenon, krypton, neon, argon, helium). Due to its high radioactivity a radon light is impractical, but if one were constructed it would glow yellow-green. In the solid state, things get very interesting with radon. As radon solidifies, it glows yellow, and then with decreasing temperature, glows an angry orange-red. This glow, or nightshine, comes from the Cerenkov light -- a product if radon's intense radioactivity. Needless to say, if you ever are viewing a glowing radon tube, you had best be standing behind very thick leaded glass.
There are no elements in Radon, Radon is an element in its own right.
Radon is a gas, possible to be in buildings. Radon 222 is an isotope of radon, the most common.
Radon.
Radon is a non-corrosive gas.
Radon is NOT reactive.
No. Radon is odorless.
Although the atomic mass number of radon is often given as 220, there are 39 isotopes and isomers of radon. The common isomers of radon are : radon-219, radon-220, and radon-222.
No alchemic symbol for radon; radon was discovered around 1900.
Radon is odorless and poisonous.
Radon is a gas, no hardness.
Radon is a gas, no ductility.