1
Q
What are the three types of radiation called?
A
Alpha
Beta
Gamma
2
Q
What is radiation?
A
Particles OR waves of high energy randomly emitted by nucleus of the atom.
3
Q
Alpha particles:
A
2 protons + 2 neutrons
Atomic mass of 4
Charge of +2
4
Q
Beta particles:
A
1 electron
Atomic mass of 1/2000
Charge of -1
5
Q
Gamma waves:
A
Short wavelength
Electromagnetic wave
NO mass or charge
6
Q
Alpha particles are ?
A
Big and easy to stop
7
Q
Beta particles are ?
A
Light in mass
8
Q
Gamma waves are ?
A
Hard to stop
9
Q
What stops alpha particles?
A
Paper or 2-3cm of air
10
Q
What stops beta particles?
A
2-3mm of aluminium
11
Q
What stops gamma waves?
A
Many centimeters of lead
GSHS Physics Additional
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