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5.1.2a Composition of the nucleus and isotopes

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Question 106

One isotope of thorium is represented by the nuclide symbol 90234Th^{234}_{90}\text{Th}90234​Th. How many neutrons and how many protons does one nucleus of this isotope contain?

A

90 neutrons and 144 protons

B

90 neutrons and 234 protons

C

144 neutrons and 90 protons

D

234 neutrons and 90 protons

Markscheme

5.1.2a Composition of the nucleus and isotopes Questions

  1. IGCSE
  2. /Physics
  3. /5.1.2a Composition of the nucleus and isotopes

170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.

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