It means that it's (a) a metal, and (b) radioactive. Radioactivity refers to certain types of atoms (certain isotopes) breaking down, converting into other types of atoms. In the process, they release energy, and certain types of radiation.
Yes. Uranium is a radioactive metal
emits radioactive particles.
Curium is a metal. It belongs to actinides.
Yes, americium is a radioactive metal. This element has no stable isotopes.
Darmstadtium is a radioactive metal but supplementary data are not known.
No: Iodine is not a metal at all, but a nonmetal. It is not necessarily radioactive, but has some radioactive isotopes.
Yes, uranium is a radioactive metal.
No. Radon is a radioactive noble gas.
Most metals are stable and thus not radioactive.
Plutonium is a man made chemical element, radioactive, actinoids family, unstable, metal, solid, toxic, fissionable with neutrons, atomic number 94.
Radioactive or not, pure cobalt is a gray metal.
caesium is the most reactive non-radioactive metal and Florine is the most reactive non-metal, but francium is the most reactive, radioactive metal