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Noble gasses
Sir William Ramsay discovered neon, argon, krypton, xenon, helium, and radon, which all formed a group called Noble gasses. -
Isotope of mass 220
The isotope of mass 220 was discovered in 1899 by Ernest Rutherford, it is a product of the radioactive decay of an isotope of thorium or thoron. -
Radon-222
Radon-222 was discovered by a German chemist Friedrich Ernst Dorn -
Radon's name
Radon was originally called Riton meaning shinning. Fredrich E. Dorn named radon, radon because he described it as radium emanation because it arose from the element radium. -
Radon measurements
In the early 1940s, Curtiss and Davis developed a radon emanation and counting system. -
Radiation experiments
From 1944 until 1974, the federal government funded radiation experiments on humans. -
Chernobyl disaster
There was a nuclear power plant disaster accident that occurred causing the death of 32 people and 12 others to suffer from radiation burns. -
Indoor Radon
The EPA tested radon levels in more than 31,000 classrooms in 927 schools across the United States. -
Radon Poisoning
U.S. Surgeon General issued a national health advisory regarding radon exposure in 2005. -
Fukushima Accident
It was a major earthquake that caused a 15-meter tsunami disabling the power supply and cooling of 3 Fukushima Daiichi reactors, causing a nuclear accident.
