Topic 4: Atomic Structure Flashcards
1
Q
What are the 3 types of radioactive decay?
A
Alpha, Beta, Gamma
α β γ
2
Q
What decay is the best and worst in penetration and ionisation?
A
Penetration- Gamma Best, Alpha Worst
Ionisation- Alpha Best, Gamma Worst
3
Q
What is alpha decay’s range in air?
A
2-5 cm
4
Q
What is beta decay’s range in air?
A
Up to 1m
5
Q
What is gamma decay’s range in air?
A
Infinite
6
Q
What is alpha decay stopped by?
A
Paper
7
Q
What is beta decay stopped by?
A
Aluminium Foil
8
Q
What is gamma decay stopped by?
A
Lead or Thick Concrete
9
Q
What are the characteristics of alpha particles?
A
- Contain two protons and two neutrons
- Identical to helium nucleus
10
Q
What are the characteristics of beta particles?
A
- Like a fast, moving electron
- Neutron turns into proton in nucleus
- Emits high energy electron
11
Q
A
