(Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1,600 years. When radium decays, it emits...

is generated. Radon isotopes are the immediate decay products of radium isotopes. The instability of 222Rn, its most stable isotope, makes radon one of...

discovery of the elements polonium and radium, using techniques she invented for isolating radioactive isotopes. Under her direction, the world's first...

generally exist in multiple variants with different masses, or "isotopes". In the 1930s, isotopes would be shown to have nuclei with differing numbers of the...

4.5 billion years for different isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238...

from boron, radioactive isotopes of phosphorus from aluminium, and silicon from magnesium. Irradiating the natural stable isotope of aluminium with alpha...

they verified it with known isotopes of radium; the process was fine. Hahn and Strassmann found a fourth radium isotope. Their half-lives were formulated...

of isotopes of stable atoms. Thomson's device was a crude version of the instrument we now term a mass spectrometer. Neon has three stable isotopes: 20Ne...

Cormicy. J. Danysz, Le Radium 9, 1 (1912); 10, 4 (1913) Danysz, J. Recherches expérimentales sur les β rayons de la famille du radium Ann. Chim. Phys. 30...

This list contains fictional chemical elements, materials, isotopes or subatomic particles that either a) play a major role in a notable work of fiction...