CAIE A-Level Chemistry AS 1.1.6 Determine the Numbers of Protons Neutrons Questions

Practise determining proton, neutron and electron numbers from atomic number, nucleon number, isotope notation and ionic charge.

Exam points

Determine the numbers of protons, neutrons and electrons in atoms and ions from nuclide and charge information.

[Maximum number: 1]

Which statement about ${ }_{53}^{131} \mathrm{I}$ is correct?

A negative ion of ${ }_{53}^{131} \mathrm{I}$ contains 53 neutrons and 52 electrons.

A negative ion of ${ }_{53}^{131} \mathrm{I}$ contains 53 neutrons and 54 electrons.

A negative ion of ${ }_{53}^{131} \mathrm{I}$ contains 78 neutrons and 52 electrons.

A negative ion of ${ }_{53}^{131} \mathrm{I}$ contains 78 neutrons and 54 electrons.

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