P7 - Radioactivity Flashcards
1
Q
P7 - Describe the properties of alpha radiation
A
A helium nucleus (2 protons and 2 neutrons).
Positively charged
The most ionising.
The least penetrating.
Stopped by a few cm of air or a thin sheet of paper.
The most dangerous at short distances.
2
Q
P7 - Describe the properties of beta radiation
A
A high energy electron.
Negatively charged.
The second most ionising.
The second most penetrating.
Stopped by a thin sheet of aluminium.
The most dangerous at mid-distances.
3
Q
A
