Ionic bonding and formulas of ionic compounds

Gallium forms a sulfate of formula $\ce{Ga2(SO4)3}$. (i) Both ionic and covalent bonding are present in this compound. State which particles are held together by each type of bond. (ii) Contrast covalent and ionic bonds in terms of what happens to the valence…

Magnesium carbonate and magnesium chloride are ionic compounds. (i) The Born-Haber cycle for magnesium chloride, $\ce{MgCl2}$, is shown with three boxes left empty. Annotate the cycle by writing the name of the process, or the formulas of the species present…

Both ionic and covalent bonding are present in sodium ethanedioate, $\ce{Na2C2O4}$. (i) Describe both types of chemical bonding present in this compound. Ionic bonding: Covalent bonding: (ii) Deduce a Lewis formula of the ethanedioate ion, $\ce{C2O4^2-}$.…

Calcium ions and phosphate(V) ions combine to form an ionic compound. What is its formula? A. $\ce{CaPO4}$ B. $\ce{Ca2(PO4)3}$ C. $\ce{Ca3(PO4)2}$ D. $\ce{Ca3(PO3)2}$

Which row shows the correct formula of aluminium sulfide and the electron configuration of each species in it? A. $\ce{Al3S2}$; Al species [Ne]; S species [Ar] B. $\ce{Al2S3}$; Al species [Ne] $3s^2\,3p^1$; S species [Ne] $3s^2\,3p^4$ C. $\ce{Al2S3}$; Al…

(i) For the carbonate ion, draw its Lewis formula. (ii) Write the chemical formula of ammonium carbonate. (iii) State why all three C–O bonds in the carbonate ion are identical. (iv) Using section 11 of the data booklet, predict the length of the C–O bonds in…

Part of the lattice of potassium bromide, KBr, is shown in an expanded view. Which statement about the lattice of potassium bromide is correct? A. Each bromide ion is in contact with six potassium ions. B. Neighbouring ions are held together by shared pairs of…

In which compound is the electrostatic attraction between the ions weakest? A. $\ce{MgO}$ B. $\ce{CaO}$ C. $\ce{CaS}$ D. $\ce{MgS}$