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Definition of isotope:
Most elements have different isotopes but theres one or two ____________ ones.
The other isotopes tend to be __________, meaning they decay into other elements and give out ___________.
Radioactivity is completely random. Radioactive substances give out radioactivity from nuclei of atoms.
Definition of background radiation:
3 things we recieve it from:
Radiation dose depends on ___________ and _____________.
How likely you are to suffer depends on type of ___________ and ___________.
The higher the dose the more likely you are to develop cancer.
3 examples where radiation dose is high:
