Further investigations 2 demonstrated the existence of at least nine radioactive periods, six of which were assigned to elements beyond uranium, and nuclear isomerism had to be assumed in order to ...

Uranium (chemical symbol U) is a naturally occurring radioactive element. In its pure form it is a silver-coloured heavy metal, similar to lead, cadmium and tungsten. Like tungsten it is very dense, ...

It is nearly impossible to find an uplifting, funny, or otherwise endearing quote on uranium — the following dark wisecrack 1 reflects people's sinister feelings about this element ...