Question

which series in periodic table contains only radioactive elements​

Answer 1

Answer:

The lanthanide series can be found naturally on Earth. Only one element in the series is radioactive. The actinide series is much different. They are all radioactive and some are not found in nature.

Answer 2

Answer:

polonium

Explanation:

All of the naturally occuring radioactive elements are concentrated between atomic numbers 84 and 118 on the periodic table, though Tc and Pm are an exception. Also note that there is a break between 110 and 118 on the table, which are suspected radioactive elements that have yet to be discovered.Aug 15, 2020