IB Chemistry HL 1.2.2 Isotopes Questions

Use isotope notation to distinguish nuclei, calculate relative atomic mass from isotope composition, and explain how nuclear differences affect physical and chemical behaviour.

Exam points

Define isotopes and use nuclear notation (Z and A) to identify isotope identity, same-element relationships and proton/neutron structure.
Calculate relative atomic mass or isotope abundance from isotope masses and percentage composition, including enriched samples and molecular isotopic composition.
Compare isotope physical and chemical behaviour by relating mass or nuclear composition to density, radius, ionization energy, chemical properties and isotope peak combinations.

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Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

State the nuclear symbol notation, ${ }_{Z}^{A} X$ , for magnesium-26.

${ }_{12}^{26} \mathrm{Mg}$

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IB Chemistry HL 1.2.2 Isotopes Questions question 1