Also referred to as pleural effusion or ' fluid on lungs ', the condition is commonly diagnosed among TB patients. Normally, there is a small amount of fluid surrounding the lungs but in TB there is bacterial growth in the fluid filled space between the chest wall and the lungs.
Following are the equations of several nuclear reactions that have important roles in the history of nuclear chemistry: 1  The first naturally occurring unstable element that was isolated, polonium, was discovered by the Polish scientist Marie Curie and her husband Pierre in 1898. It decays, emitting Î± particles:
Tungsten's chemical symbol, W, is taken from an alternative name for the element, wolfram. Discovery and naming The first mention of tungsten and its compounds can be traced to about 1761. German chemist Johann Gottlob Lehmann (1719-67) was studying a mineral known as wolframite. He found two new substances in the mineral but did not recognize that they were new elements. About twenty years later, Scheele also studied this mineral.