These are similar to one and two mark questions but you will be expected to write in more depth for three and four mark questions.
Edexcel questions courtesy of Pearson Education Ltd.
The figure shows the structure of an oxygen-14 atom:
Complete the four labels on the figure. [4 marks]
In the oxygen nucleus there are always 8 protons. There are 8 green particles so these are the protons . The six grey particles must be the neutrons .
Iodine-131 emits beta particles and gamma rays.
A patient is only given a small dose of iodine-131 during treatment.
Hospital staff who administer this treatment to a lot of patients are potentially exposed to greater risk.
Explain the dangers to hospital staff and state one safety precaution taken. [3 marks]
An explanation linking any two of:
Safety - any one from:
Cobalt-60 is radioactive.
It emits beta radiation and gamma radiation.
Describe the differences between beta radiation and gamma radiation. [3 marks]
A description including any three of the following points: