SPM Science 2018, Paper 2 (Question 8)

Question 8:
Diagram 8 shows the deflection of radioactive radiation by an electrical field.

Diagram 8

(a) Name the radioactive radiation P. [1 mark]

(b) Radioactive radiation Q is not deflected by the electrical field.
Give a reason for the observation. [1 mark]

(c) Which radiation has
(i) the highest penetration power?
(ii) the highest ionization power? [2 marks]

(d) Name one example of radioactive substance used in medical field. [2 marks]
Explain its usage.

Radiation P: Beta ray

Radioactive radiation Q is neutral to the electrical field

Gamma rays has highest penetration power

Alpha ray has highest ionization power

Used to treat cancer

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