IB Physics HL E 1 2 Nuclear Notation Questions

Use HL nuclear notation to identify protons, neutrons and nucleon number, balance nuclear reactions and distinguish isotopes from nuclides.

Exam points

Balance and interpret nuclear reaction equations using conservation laws.
Determine unknown particles, nuclides, proton numbers and nucleon numbers in nuclear processes.
Apply nuclear notation and reaction data to fission, fusion and decay problems.

[Maximum number: 2]

This question is in two parts. Part 1 is about kinematics and gravitation. Part 2 is about radioactivity.

Part 1 Kinematics and gravitation

A ball is released near the surface of the Moon at time t=0. The point of release is on a straight line between the centre of Earth and the centre of the Moon. The graph below shows the variation with time t of the displacement s of the ball from the point of release.

Figure for Question IB Physics HL E 1 2 Nuclear Notation Questions question 1 — IB Physics HL

(a)

Part 2 Radioactivity

Radium-224 $\left({ }_{88}^{224} \mathrm{Ra}\right)$ is a radioactive nuclide that decays to form radon-220. Radon-220 is itself radioactive and undergoes a further decay. The table shows the series of radioactive nuclides that are formed as the decays proceed. The series ends with a stable isotope of lead.

For the final thallium nuclide, identify the

[ 2 ]

(i)

nucleon number.

[ 1 ]

(ii)

proton number.

[ 1 ]

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IB Physics HL E 1 2 Nuclear Notation Questions question 1

Question (a)

Question (i)

Question (ii)