A versatile set suited to G.C.S.E. and Advanced level courses covering a comprehensive range of organic, inorganic molecules from simple ones to complex ions. Consisting of: Spheres: 6 Carbon, 22 Oxygen, 10 Nitrogen, 12 Sulphur, 8 Halogen, 14 Metal, 7 Phosphorous and 14 Hydrogen. Links: 50 medium grey and mauve, and 36 long grey. Packed in a plastic box with instructions.