Radioactive Decay Flashcards
1
Q
In what order were the following particles discovered?
Electron, Neutron, Proton, Nucleus
A
- Electron
- Nucleus
- Proton
- Neutron
2
Q
What happens when a nucleus is unstable?
A
It decays by emitting radiation.
3
Q
What does unstable mean?
A
When a nucleus has too many/few neutrons.
4
Q
How does an unstable nucleus decay?
A
By emitting an alpha particle, beta particle or a gamma ray
5
Q
If the nucleus has too few neutrons it will emit ____.
A
an alpha particle
6
Q
How is an alpha particle written?
A
4
He
2
7
Q
If the nucleus has too many neutrons, a neutron will turn into a proton and emit a fast-moving electron. This electron is called ________.
A
a beta particle
8
Q
How is a beta particle written?
A
0
e
-1
9
Q
After emitting an alpha or beta particle, the nucleus will emit ___________.
A
a gamma ray
