IB Chemistry HL 2.1.2 Ionic Bonding Question Bank

Practise IB Chemistry HL 2.1.2 by deducing ionic formulas and names, analysing polyatomic ions and comparing electrostatic forces across ionic and mixed-bond compounds.

Exam points

state ionic bonding as electrostatic attraction between oppositely charged ions
write a neutral formula by balancing cation and monatomic or polyatomic anion charges
separate ionic attraction between ions from covalent bonding inside a polyatomic ion

[Maximum number: 1]

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

In addition to magnesium oxide, magnesium forms another compound when burned in air. Suggest the formula of this compound.

$\mathrm{Mg}_{3} \mathrm{~N}_{2}$

Marking guidance:

Accept $\mathrm{MgO}_{2}, \mathrm{Mg}(\mathrm{OH})_{2}, \mathrm{Mg}\left(\mathrm{NO}_{x}\right)_{2}, \mathrm{MgCO}_{3}$ .

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2.1.2—Ionic bonding question 1