Topic 6.2- Atoms and Radiation

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What is a radioactive substance?
A radioactive substance is one which gives out radiation from its nuclei all the time, no matter what is done to it
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Where does Background Radiation come from?
It comes from natural sources (e.g. rocks and cosmic rays) and from man-made sources (e.g. nuclear warfare)
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What is the structure of an alpha particle?
An alpha particle consists of 2 neutrons and 2 protons- the same as a helium nucleus
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What is the structure of a beta particle?
A beta particle consists of an electron from the nucleus
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What is gamma radiation?
Gamma radiation is electromagnetic radiation from the nucleus
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What types of radiation are deflected by both electric and magnetic fields
Alpha and beta
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What is the half-life of a radioactive isotope?
The average time taken for the number of nuclei of the isotope in the sample to halve
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Card 2

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Where does Background Radiation come from?

Back

It comes from natural sources (e.g. rocks and cosmic rays) and from man-made sources (e.g. nuclear warfare)

Card 3

Front

What is the structure of an alpha particle?

Back

Preview of the front of card 3

Card 4

Front

What is the structure of a beta particle?

Back

Preview of the front of card 4

Card 5

Front

What is gamma radiation?

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Preview of the front of card 5
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