Question

the periodic tables largest group, ____, includes radioactive elements. nonmetals alka metals transition metals the lanthanide series

Explanation:

The transition - metals are the largest group in the periodic table. Some transition metals are radioactive, such as technetium. Non - metals and alkali metals are not the largest groups. The lanthanide series is a subset within the larger classification of elements and is not the largest group overall.

Answer:

C. transition metals