Sam Ullman ↔ Web Developer

Radon


86

Rn

Radon
222.00000
2
8
18
22
8
2

Source

Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days.