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 NOT reactive.
No. Radon is odorless.
Radon is odorless and poisonous.
Radon is a gas, no ductility.
Radon is a gas, no hardness.
The chemical symbol of radon is Rn.
No, not radon. Radon is known to cause lung cancer.
Radon testing lets you test for radon gas. Radon gas is harmful to your health and cause things such as cancer.
You need a radon detector to perform radon testing. Essentially it's a geiger counter. Radon is radioactive and you locate it just the same way. Many radon alarms are available for areas where Radon is a problem. You would need a radon detector for radon testing. You can purchase one from amazon.com for $130 shipped. http://www.amazon.com/dp/B000CEAY64
No, radon is not a thick brownish haze; it is a colorless, odorless, radioactive gas that is produced naturally from the decay of uranium in soil, rock, and water. It is typically found in indoor environments, particularly in basements and poorly ventilated areas. The brownish haze you might be thinking of is likely smog or particulate matter resulting from air pollution and chemical reactions in the atmosphere.