Actinium is a radioactive chemical element with the symbol Ac and atomic number 89. It is a silvery-white, rare and radioactive metal that is found in uranium ores. Actinium is a member of the actinide series and is the first element in the series
Actinium is a radioactive chemical element with the symbol Ac and atomic number 89. It is a silvery-white, rare and radioactive metal that is found in uranium ores. Actinium is a member of the actinide series and is the first element in the series