Lr Lawrencium 103 (262) 7 d 103 [Rn] 5f14 6d1 7s2 2 8 18 32 32 8 3 None Unknown {"1":"470"} 3 10.0 1 10 h 14.4h AlphaEmission TransitionMetal, Metal, Radioactive, Synthetic lor-ENS-i-em Synthetic radioactive metal. It has no significant commercial applications. Produced by bombarding californium with boron ions. _zBsnnJOkyA Lawrencium

Radon was discovered in 1900 by Friedrich Ernst Dorn in Halle, Germany.

He reported some experiments in which he noticed that radium compounds emanate a radioactive gas.

In 1910, Sir William Ramsay and Robert Whytlaw-Gray isolated radon, determined its density, and determined that it was the heaviest known gas. The name was derived from radium; called niton at first, from the Latin word nitens meaning shining 103 1961 Albert Ghiorso, Torbjorn Sikkeland, Almon Larsh, Robert M. Latimer United States The origin of the Amercian Chemical Society preferred name is Ernest O. "Lawrence", inventor of the cyclotron

Radon is highly radioactive and a carcinogen

Upon condensation, radon glows because of the intense radiation it produces

Radon is used in hydrologic research that studies the interaction between ground water and streams.

Radon has been produced commercially for use in radiation therapy.

Radon has been used in implantable seeds, made of gold or glass, primarily used to treat cancers.