P2 Physics - types of ionising radiation, properties and uses, half life Flashcards Preview

Science B2 C2 P2 > P2 Physics - types of ionising radiation, properties and uses, half life > Flashcards

Flashcards in P2 Physics - types of ionising radiation, properties and uses, half life Deck (9)
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1

what are the three types of nuclear radiation?

alpha,
beta
gamma

2

how can alpha radiation be stopped?

absorbed by a sheet

3

how can beta radiation be stopped?

thin sheet of aluminum

4

how can gamma rays be stopped?

cm of lead, many metres of concrete

5

how many protons and neutrons are lost when a nucleus admits alpha radiation?

2 protons
2 neutrons

6

what happens when a nucleus admits beta radiation?

the proton stays inside the nucleus
neutron leaves

7

what can radiation be used for? 3 things

detect smoke
treat cancer
sterilise medical equipment

8

what s radioactive decay?

when nuclei of radio active atoms break down to completely different atoms

9

what is the definition of half life?

1. the time it takes for the number of nuclei of the isotope in a sample to halve