(During the early study of radioactivity, some other heavy radioactive isotopes were given names, but such names are rarely used today.)
There are other isotopes that had their own names when scientists studied radioactivity.But, their names are no longer used today.
There are other isotopes that had their own names when scientists studied radioactivity.But, their names are no longer used today.
단순화를 위해 이 문장을 다시 작성하십시오: (During the early study of radioactivity, some other heavy radioactive isotopes were given names, but such names are rarely used today.) 산출: