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5.1.2a Composition of the nucleus and isotopes

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Question 8

Carbon-12 and Carbon-14 are isotopes of carbon.

The nuclide notation for C-12 and C-14 is shown below:

0612Cand0614C ^{12}_{\phantom{0}6}\text{C} \quad \text{and} \quad ^{14}_{\phantom{0}6}\text{C} 0612​Cand0614​C
a.

Compare the number of protons in one nucleus of C-12 with the number of protons in one nucleus of C-14.

[1]
b.

Compare the number of neutrons in one nucleus of C-12 with the number of neutrons in one nucleus of C-14.

[2]
c.

A sample contains another isotope of carbon. The half-life of this isotope is 12 hours.

Calculate the time taken for the mass of this isotope in the sample to decay from 80.0 mg to 10.0 mg.

[2]
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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