IGCSE · 5 · multiple choice
Nuclear physics · Question 4
Nuclear physics · Original GioPhysics question with a detailed, mark-by-mark answer guide.
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multiple choice1 mark
A nucleus of ²²⁶₈₈Ra decays by emitting an α-particle. What is the nuclide produced?
- A
²²²₈₆Rn
- B
²²²₈₈Ra
- C
²²⁶₈₆Rn
- D
²²⁶₈₉Ac
Ready to self-mark?Reveal the detailed answer guide
Answer overviewCorrect answer: A — ²²²₈₆Rn
01
1 markAnswer and reasoning
How to approach it
Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.
- 1
The correct choice is A: ²²²₈₆Rn
- 2
B changes only the nucleon number and C only the proton number. D is a beta decay. An α-particle carries away two protons and two neutrons, so both numbers must fall — by 2 and by 4.
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