Question

the largest group on the periodic table, ____, includes radioactive elements. transition metals semiconductors alkali metals noble gases

Explanation:

Transition metals are the largest group on the periodic table and include radioactive elements like technetium. Semiconductors are not a group but a class of elements with specific electrical - conductivity properties. Alkaline metals are a smaller group and do not have as many radioactive elements. Noble gases are also a smaller group and are generally non - radioactive.

Answer:

transition metals