|
1. Carbon-14 is radioactive. Its nucleus emits beta radiation.
Beta radiation will pass through: few centimetres of air and a sheet of paper.
2. Radon-220 is radioactive. Its nucleus emits alpha radiation.
Alpha radiation will pass through a sheet of paper.
3. Properties of alpha, beta and gamma radiation.
| |
Alpha
|
Beta
|
Gamma
|
| Nature |
Particle |
Particle |
Electromagnetic wave |
| Nature
(Higher) |
2 protons
& 2 neutrons |
High
energy electrons |
Electromagnetic wave |
| Comes
from ... |
Unstable
nucleus of radioactive element
|
| Stopped
by |
Paper
or few cm of air
|
Few mm of aluminium |
Few cm of lead or few
metres of concrete. |
| |
|
