P7.1 Atoms and radiation Flashcards
1
Q
What are the three types of radiation?
A
Alpha radiation
Beta radiation
Gamma radiation
2
Q
In Rutherford’s experiment why did the alpha particles rebound of the foil?
A
He proved that this happens because every atom has at its centre a positively charged nucleus containing most of the mass of the atom
3
Q
What are the features of a radioactive substance?
A
It has an unstable nucleus that becomes less stable or more stable by emitting alpha, beta or gamma radiation
