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Study E.3.2—Binding energy and mass defect conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

[Maximum number: 3]

The binding energy of the stable nuclide ${ }_{54}^{131} \mathrm{Xe}$ is 1.105 GeV .

(a)

Outline what is meant by binding energy.

[ 1 ]

(b)

Calculate, in $\mathrm{GeV} \mathrm{c}^{-2}$ , the mass of a nucleus of ${ }_{54}^{131} \mathrm{Xe}$ .

[ 2 ]

Use of Binding energy = mass of separate nucleons - mass of nucleus
$\begin{aligned} \text { « } 1105=54 \times 938+77 \times 940-M c^{2} \text { » } M=122 \text { « } \mathrm{GeVc}^{-2} \text { » } \end{aligned}$

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Award ECF from using binding energy with incorrect sign.

An answer that doesn't include binding energy scores [0].

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IB Physics HL E 3 2 Binding Energy and Mass Defect Topic Practice

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Question 1

Question (a)

Question (b)