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Radioactivity Matching
In Rutherford's experiment, what were the main observations?
Most of the alpha particles missed the nucleus, but a few bounced straight back.
A beta decay occurs when . . .
a neutron changes into a proton - it emits an electron which takes away negative charge.
What task did Ernest Rutherford set to his students, Geiger and Marsden?
To fire alpha particles at a sheet of gold foil.
When sources of radiation are inside the body, which are most dangerous?
Alpha
Gamma rays are . . .
a form of electromagnetic radiation.
Isotopes are . . .
atoms of the same element which have different numbers of neutrons in the nucleus.
What type of radiation would be most suitable for use as a biological tracer in a patient?
Gamma
Beta particles travel at nearly the speed of light but are mostly absorbed by . . .
a few mm of metal.
The radioisotope potassium-40 can be used to date igneous rocks because . . .
its stable decay product argon is unable to escape from the rock.
The age of a rock can be found by comparing . . .
the relative proportions of uranium and lead in the rock.
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Created by: J Thomson
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