A level: Radioactivity Questions

Q13.

(a) An unstable nucleus, , can decay by emitting a β^– particle.

(i) What part of the atom is the same as a β^– particle?

(1 mark)

(ii) State the changes, if any, in A and Z when X decays.

(2 marks)

(b) In the process of β^–decay an anti-neutrino is also released.

(i) Give an equation for this decay.

(1 mark)

(ii) State and explain which conservation law may be used to show that it is an anti-neutrino rather than a neutrino that is released.

(2 marks)

(iii) What must be done to validate the predictions of an unconfirmed scientific theory?

(2 marks)

(Total 8 marks)