A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). This is useful in quantizing the activity of a radioactive source or determining if an area containing radioactive material is safe to enter. Assuming that you have one mole of gas, if a geiger counter is filled with 1.0190 Ã? 104 Pa of argon gas at room temperature (T = 20.0 C), what is the density of the gas in this geiger tube?