Doc Brown's GCSE OCR 21st Century Science-Physics Revision Notes

PLEASE NOTE NEW revision summaries for the NEW OCR 21st Century Science B GCSE Physics B and NEW OCR GCSE 21st Century Combined Science B Physics courses: Revision for Chapters P1-3 and  Chapters P4-6 STARTING with Y10 in Sept. 2016 onwards, first exams in 2018

OCR GCSE 21st Century Science Physics Module P6 Radioactive materials

P6.1 Why are some materials radioactive?