

- Einsteinium is a man-made radioactive metal. This quartz vial contains approximately 300 micrograms of solid Einsteinium-253. The blue light results from the intense radiation produced by einsteinium, primarily in the form of alpha decay.R.G. Haire, US Department of Energy

- Einsteinium is a radioactive rare earth element.Justin Urgitis

- This diagram of an einsteinium atom shows the electron shell.Greg Robson,Creative Commonns License