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what types of radiation are there ?
there are 3 types - Alpha, Beta & Gamma
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What is used to detect ionisation ?
The Geiger-muller tube which is attached to a Geiger counter
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The most penetrating radiations in order of penetration
Alpha is absorbed by a thin sheet of paper, Beta by a few millimetres of aluminium & Gamma is not even totally absorbed by several centimetres of lead
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when do radioactive emissions occur ?
they occur RANDOMLY
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Time taken for the number of atoms in a sample to halve is called ?
The HALF-LIFE
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What is the unit for number of atoms decaying per unit time ?
It is measured in units called the Becquerel
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What is 1 Bq equal to ?
1 Bq is equal to 1 count per second
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Other cards in this set

Card 2

Front

What is used to detect ionisation ?

Back

The Geiger-muller tube which is attached to a Geiger counter

Card 3

Front

The most penetrating radiations in order of penetration

Back

Preview of the front of card 3

Card 4

Front

when do radioactive emissions occur ?

Back

Preview of the front of card 4

Card 5

Front

Time taken for the number of atoms in a sample to halve is called ?

Back

Preview of the front of card 5
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