The Actinide series.
Radioactive elements exist in all groups of the periodic table.
The actinides
After disintegration all radioactive elements are transformed in other elements.
The Actinide series.
This family is called, after IUPAC nomenclature -- actinoids.
Not all of the transition elements are radioactive. Many of them are, and some of them have common radioactive isotopes, but some of them have no naturally occurring radioactive isotopes. Please note that all elements have synthetic radioactive isotopes, at least.
Yes. Stable elements are 83 elements. all elements above that of atomic number 83 (Bismuth) are radioactive. Radioactive isotopes are of the order of 1500 radioactive isotope.
Radioactive elements exist in all groups of the periodic table.
All elements comprising the period 7 in the periodic table are radioactive. In total this period has 32 elements.
None - they are all radioactive.
Usually not, but all elements have radioactive isotopes.
radioactive