Question 1a
a)
Transition metals can form complex ions where ligands are coordinately bonded to the central metal ion.
i) Define the term ligand.
[1]
ii) State what is meant by the term bidentate ligand
[1]
Question 1b
b)
Transition metals are located in the d-block of the periodic table.
i)
State the electron configuration of V2+.
[1]
ii)
Explain why scandium is not considered a transition metal.
[1]
Question 1c
c)
State the oxidation state of Fe in [Fe(CN)6]4−.
[1]
Question 1d
d)
Iron and zinc are in the d-block of the Periodic Table. Iron(II) ions, [Fe(H2O)6]2+, form a pale green solution but zinc ions, [Zn(H2O)6]2+, form a colourless solution.
i)
Write the electron configuration of Zn2+.
[1]
ii)
Explain why zinc ions are colourless.
[2]
