(2 marks) QUESTION 4
a) Fill in the blank with the correct answer.
is a process where protons are ejected from a metal surface when light is
incident on that surface.
(1 mark)
b) The activity of a radioisotope is found to decrease 40% of its original value in
2.59 x 106 s.
Calculate;
i) The decay constant of the radioisotope.
(3 marks)
ii) The half-life of the radioisotope.
(2 marks)
END OF QUESTION PAPFR