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? |
a form of electromagnetic radiation. |
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? |
Beta particles travel at nearly the speed of light but are mostly absorbed by . . . |
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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