Topic 7 radioactivity Flashcards
(7 cards)
1
Q
What is radioactive decay
A
Emitting radiation
2
Q
Why are some nucleai unstable
A
-Larger size
-Too many neutrons
-Too little neutrons
3
Q
What are the types of radiation
A
Alpha
Beta
Gamma
4
Q
Describe Alpha radiation
A
- Helium nucleus
- +2 charge
- Small penetration power
- High ionisation power
- Very little penetration power
5
Q
Describe Beta radiation
A
- Electron with a lot of kinetic energy
- Neutron changes into Proton and Electron
- -1 charge
- Medium ionisation power
- More penetration power than alpha
6
Q
Describe Gamma Rey
A
- Electromagnetic wave
- No charge
- Highest penetration power
- Low ionisation power
7
Q
A
