Xofigo

Radium-223 (223Ra, Ra-223) is an isotope of radium with an 11.4-day half-life. It was discovered in 1905 by T. Godlewski,[2][3][4] a Polish chemist from Kraków, and was historically known as actinium X (AcX).[5][6] Radium-223 dichloride is an alpha particle-emitting radiotherapy drug that mimics calcium and forms complexes with hydroxyapatite at areas of increased bone turnover.[7] The princi... [wikipedia]