Alpha, beta and gamma radiation Flashcards
1
Q
What types of radiation can me emitted during radioactive decay
A
- Alpha
- Beta
- Gamma
- Neutrons
2
Q
Explain alpha particles
A
- 2 protons and 2 neutrons
- Same molecular make up as a helium atom (often shown using He)
- No electrons: charge of +2
- Relatively large
- High ionisation power
- Low penetration distance (stopped by 1 piece of paper)
3
Q
Explain beta particles
A
- 1 electron
- Charge of -1
- Obtained as a neutron from the nucleus decays into an electron and a proton. The proton stays in the nucleus and the electron is emitted at high speeds
- Relatively no mass
- Moderate ionisation power
- Moderate penetration distance (stopped by 5mm of aluminium)
4
Q
Explain gamma radiation
A
- Radiation emitted from a radioactive nuclei to make the nuclei less energetic but does not change its mass or structure
- No mass or charge
- Very weak ionisation strength
- Very high penetration distance (stopped by 30cm of lead)
5
Q
Explain neutrons (radiation)
A
- Emitted from nucleus if too many neutrons is making the isotope unstable
- Makes atom more stable