JEE Main & Advanced
Physics
Nuclear Physics And Radioactivity
Question Bank
Radioactivity
question_answer
Which of the following statements are true regarding radioactivity (I) All radioactive elements decay exponentially with time (II) Half life time of a radioactive element is time required for one half of the radioactive atoms to disintegrate (III) Age of earth can be determined with the help of radioactive dating (IV) Half life time of a radioactive element is 50% of its average life period Select correct answer using the codes given below Codes: [SCRA 1994]