Natural and artificial disintegration series trace the radioactive decay of heavy elements to stable — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

Options A, B, and C are correct facts about the radioactive disintegration series. The $4n+1$ series is man-made and uniquely ends at Bi-209. Option D is incorrect; while the Actinium series is the $4n+3$ series, it technically starts from the natural parent isotope Uranium-235 (${}_{92}^{235}U$), not Actinium (though Actinium is an intermediate member).