Polonium crystal structure, computer model. This is the alpha (cubic) form of solid polonium. Polonium is a rare radioactive element. It is most often found in nature in uranium ores. There are 25 known isotopes of polonium, with polonium-210 being the most common. Polonium can be produced artificially by bombarding bismuth or lead with neutrons. It has been used as an energy source to power thermoelectric cells in satellites and Soviet moon rovers. Polonium is highly toxic, and only trace amounts are needed for poisoning to be fatal. Polonium-210 was used to kill the former KGB agent Alexander Litvinenko in London, UK, in November 2006.

Photo website with Rights Managed and Royalty Free stock photos, images, illustrations and footage available for download immediately for commercial and editorial uses. Aflo is a leading independent supplier and producer of stock pictures and visual content. Search and find high quality images and video for design, print, web-use and publishing. Buy photos from our extensive collection of model released and property released sports images. Search some of the most beautiful travel and landscape pictures from our own photographers and license from our large collection of content, modern and archive, focusing on Japan. We provide free research. Register for personal account management and for full use of our Stock Photography website and start to download images now.