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IGCSE Radioactivity (Fission nuclear-fission (Moderator, Control rods,…
IGCSE Radioactivity
Fission
Moderator
Control rods
Chain reaction
Three types of ionising radiation
Alpha
Highly ionising
Stopped by paper
Helium nucleus
Beta
Medium ionising power
Electron
Stopped by aluminium
Gamma
Electromagnetic wave
Low ionising power
Stopped by lead
Health
https://www.youtube.com/watch?v=zI2vRwFKnHQ
Medical tracers
Damage to DNA, mutations and cancer
Fusion
High temperatures
Happens in stars
Radioactive decay
Half life
Time taken for half of the active nuclei in a sample to decay
