What radioactive decay is
What radioactive decay is
An atom has a tiny nucleus containing protons and neutrons. The proton number ZZZ is the number of protons, and the mass number AAA is the total number of protons and neutrons.
Step-by-step lessons on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one builds up to exam-style questions. Build a strong foundation in mechanics and electricity before tackling the more mathematically demanding astrophysics and nuclear topics.