Is Thorium An Element?
Is Thorium An Element? Thorium (Th), radioactive chemical element of the actinoid In what group is the element thorium? GroupActinides Melting point Period 7 Boiling point Block f Density (g cm− 3) Atomic number 90 Relative atomic mass State at 20°C Solid Key isotopes Is thorium a metal? When pure, thorium is a silvery white