CAIE A-Level Physics AS 11.1.5 The Notation a Z X for the Representation of Nuclides Questions

Read and write nuclide notation, identify nucleon and proton numbers, and determine neutron or electron counts for atoms, ions and nuclear changes.

Exam points

Identify isotopes as nuclei of the same element with the same proton number but different neutron numbers.
Compare isotope compositions by matching proton numbers and distinguishing their neutron counts.

[Maximum number: 1]

Radon-211, ${ }_{86}^{211} \mathrm{Rn}$ , francium-210, ${ }_{87}^{210} \mathrm{Fr}$ , and radium-212, $\underset{88}{212} \mathrm{Ra}$ , are three nuclides.
How many neutrons does each nuclide have in its nucleus?

radon-211

francium-210

radium-212

125

123

124

211

210

212

297

300

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CAIE A-Level Physics AS 11.1.5 The Notation a Z X for the Representation of Nuclides Questions question 1