Transition Metals:
The following are sample non multiple choice questions taken from recent exams: These particular questions cover:
      • Ligands.
      • Crystal Field Theory.
      • Magnetism.
1aA ligand that can bond two times to a metal ion is called _______________ . 

1bSketch the Lewis structure of the oxalate anion, C2O4-2, to demonstrate this.

Note: Each carbon is bonded to two oxygens and the other carbon.
2aSketch a Lewis structure for NH3.

2bCircle the area on the Lewis structure that makes NH3 a good ligand.

3In an octahedral field some of the d-orbitals interact very strongly with the ligand electrons. Sketch a picture of a d-orbital that interacts strongly.
4aAn aqueous solution of cobalt (III) is diamagnetic (hexaaquacobalt (III) ion). Draw an orbital energy diagram to illustrate this.

4bIn excess fluoride ion, the above cobalt solution becomes paramagnetic.  Draw an orbital energy diagram to illustrate this.

4cThe stronger field ligand is ________________________ .