Complete these sentences by selecting the correct answers from the drop-down menus.

Question

Revolt · Accepted Answer

After one half-life, % of the atoms will change to a stable isotope and % will remain radioactive.:

50

After one half-life, % of the atoms will change to a stable isotope and % will remain radioactive.:

50

After three half-lives, % of the atoms will change to a stable isotope and % will remain radioactive.:

87.5

After three half-lives, % of the atoms will change to a stable isotope and % will remain radioactive.:

12.5

Radioactivity