radioactivity and particles Flashcards
1
Q
atom consists of:
A
- positive protons
- neutral neutrons
- surrounded by negatively charged electrons
2
Q
alpha
A
- heavy nucleus emits alpha particle
- highly ionising
- weakly penetrating
stopped by a sheet of paper
3
Q
stopped by a sheet of paper
A
alpha
4
Q
beta
A
- neutron turns into proton emits beta
- moderately ionising
- moderately penetrating
stopped by thin sheet of aluminium
5
Q
stopped by aluminium
A
beta
6
Q
gamma
A
- form of electromagnetic radiation
- low ionising
- high penetrating
stopped by many cm of lead
7
Q
stopped by a few cm of lead
A
gamma
8
Q
neutron radiation
A
nuclear fission
9
Q
Geiger-Muller tube
A
- detect radiation
- absorb radiation
- produce clicking sound
10
Q
contamination occurs when
A
radioactive source been introduced into or onto an object
11
Q
irradiation occurs when
A
object is exposed to a radioactive source which is outside an object.
12
Q
safety measures in radiation (5)
A
minimising time
big distance
disposing carefully
shielding
remote handling
13
Q
nuclear fission
A
splitting nucleus
14
Q
what is splitting the nucleus called?
A
nuclear fission
15
Q
nuclear fusion
A
fusing two nuclei to form larger nucleus called nuclear fusion
