P7 - Radioactivity Flashcards Preview

AQA GCSE Physics > P7 - Radioactivity > Flashcards

Flashcards in P7 - Radioactivity Deck (8)
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1

What does a radioactive substance contain?

an unstable nuclei that becomes stable by emitting radiation

2

3 main types of radiation?

α - Alpha
β - Beta
γ - Gamma

3

Most penetrating radiation?

Gamma

4

Least penetrating Radiation?

Alpha

5

How does a Geiger counter work?

It clicks each time a particle of radiation enters the tube

6

Who discovered alpha and beta radiation?

Ernest Rutherford

7

Energy is released in a nuclear reactor because of...

nuclear fission

8

Nuclear fission =

the splitting of an atoms nucleus into 2 smaller nuclei and the release of 2 or 3 neautrons and energy