Named after Thor, the Norse God of Thunder, thorium could provide a cleaner source of nuclear power in the future.
All of its isotopes are radioactive, and it was the second element to be classified as radioactive, says Professor Allan Blackman from the Auckland University of Technology, in episode 85 of Elemental.
The Elemental podcast is celebrating 150 years since the periodic table was first published by Russian chemist Dmitri Mendeleev.
Find out more about events during the United Nation’s International Year of the Periodic Table.
Professor Allan Blackman is at Auckland University of Technology.