IGCSE · 5 · multiple choice
Nuclear physics · Question 1
Nuclear physics · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- recall
- Marks
- 1
- Topics
- 1
- Answer
- Complete
multiple choice1 mark
How many neutrons are there in a nucleus of ²³⁵₉₂U?
- A
92
- B
143
- C
235
- D
327
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Answer overviewCorrect answer: B — 143
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 B: 143
- 2
A gives the proton number and C the nucleon number. The neutron number is the difference, 235 − 92 = 143, and D adds them instead.
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