Radon was discovered by Friedrich Ernst Dorn at 1900 in Germany.
Origin of name: named after "the element radium" (radon was called niton at first, from the Latin word "nitens" meaning "shining".
Atomic Number: 86
Atomic Weight: 222
Melting Point: 202 K (-71°C or -96°F)
Boiling Point: 211.45 K (-61.7°C or -79.1°F)
Density: 0.00973 grams per cubic centimeter
Phase at Room Temperature: Gas
Element Classification: Non-metal
Period Number: 6 Group Number: 18 Group Name: Noble Gas