Easyphysics
GCSE - OCR 21 Century 
P3 Radioactive Materials

Did you know? 

Half-life of radioisotopes ranges from 61 seconds for ismuth-212 to 4.5 billion years for uranium-238.

 

      

 P3 Half-life

Syllabus Summary Questions Answers

       

    Specification reference

  • P3.1: Why are some materials radioactive? 

    Learning outcomes

  • To define half-life.

  • Higher tier only: To calculate half-life of a radioactive isotope.

    Keywords

  • Half-life - activity - radioisotope.