Question

In every radioactive series, the final element formed is lead (Pb).

• A. True
• B. False

Answer 1

The correct option is A True

Radioactive series, any of four independent sets of unstable heavy atomic nuclei that decay through a sequence of alpha and beta decays until a stable nucleus is achieved

The thorium-$232$, Uranium-$238$ and actinium-$227$ these three series ends with lead

But neptunium series which is named for its longest-lived member, neptunium-$237$ it ends with Bismuth-$209$

Hence not every radioactive series ends with lead