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Nuclear and particle physics

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Question 26

The mass of a proton is mpm_\text{p}mp​, the mass of a neutron is mnm_\text{n}mn​, and the mass of a lithium-7 (37Li^{7}_{3}\text{Li}37​Li) nucleus is MMM. The speed of light in a vacuum is ccc.

Which expression is correct for the binding energy (B.E.) of the lithium-7 nucleus?

A

B.E.=(3mp+7mn−M)c2\text{B.E.} = (3m_\text{p} + 7m_\text{n} - M)c^2B.E.=(3mp​+7mn​−M)c2

B

B.E.=(4mp+3mn−M)c2\text{B.E.} = (4m_\text{p} + 3m_\text{n} - M)c^2B.E.=(4mp​+3mn​−M)c2

C

B.E.=(3mp+4mn−M)c2\text{B.E.} = (3m_\text{p} + 4m_\text{n} - M)c^2B.E.=(3mp​+4mn​−M)c2

D

B.E.=(M−3mp−4mn)c2\text{B.E.} = (M - 3m_\text{p} - 4m_\text{n})c^2B.E.=(M−3mp​−4mn​)c2

Markscheme

Nuclear and particle physics Questions

  1. A Level
  2. /Physics
  3. /Nuclear and particle physics

90 exam-style questions on OCR A A Level Physics Nuclear and particle physics, covering The nuclear atom, Fundamental particles, Radioactivity, and Nuclear fission and fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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