Types of radiation Flashcards
1
Q
Why are some elements radioactive?
A
an imbalance between the numbers of protons and neutrons in the nucleus
2
Q
Radioactive decay is a ……..
A
Random process
3
Q
What do control rods do?
A
absorb neutrons
4
Q
What do control rods do?
A
absorb neutrons
5
Q
what does a moderator do?
A
Slow down neutrons
6
Q
What are isotopes?
A
Atoms with the same proton number but different nucleon numbers
7
Q
Why are there different levels of background radiation?
A
- different rocks in each area
- height above sea level will affect how much radiation is emitted from cosmic rays.
8
Q
When you measure radiation why do you repeat readings?
A
-to reduce the effect of random fluctuations ( as nuclear decay is a random process)
9
Q
Properties of a fission reaction?
A
- Technology already developed
- Fuel, uranium, is running out
- The new nuclei produced are radioactive and have a variety of half-lives so must be stored safely
- Requires moderators and control rods to ensure a safe and controlled chain reaction
- Releases less energy
10
Q
Properties of a fusion reaction?
A
Not possible in a sustainable
way
