Q15.
Aluminium and thallium are elements in Group 3 of the Periodic Table.
Both elements form compounds and ions containing chlorine and bromine.
(a) Write an equation for the formation of aluminium chloride from its elements.
(1)
(b) An aluminium chloride molecule reacts with a chloride ion to form the AlCl4− ion.
Name the type of bond formed in this reaction. Explain how this type of bond is formed in the AlCl4− ion.
(2)
(c) Aluminium chloride has a relative molecular mass of 267 in the gas phase.
Deduce the formula of the aluminium compound that has a relative molecular mass of 267
(1)
(d) Deduce the name or formula of a compound that has the same number of atoms, the same number of electrons and the same shape as the AlCl4− ion.
(1)
(e) Draw and name the shape of the TlBr52− ion.
(2)
(f) (i) Draw the shape of the TlCl2+ ion.
(1)
(ii) Explain why the TlCl2+ ion has the shape that you have drawn in part (f)(i).
(1)
(g) Which one of the first, second or third ionisations of thallium produces an ion with the electron configuration [Xe] 5d106s1?
(1)
(Total 10 marks)