Suitable for constructing complex organic and inorganic molecules. The teacher set contains 100 atom centers and 86 bonds. Includes a durable plastic storage box with a copy of the periodic table for easy reference. SMALL PARTS: NOT FOR CHILDREN UNDER 3 YRS. Contents: Carbon (Black) . . . . . . . . . . . . . 12 Hydrogen (White) . . . . . . . . . . . 14 Oxygen (Red) . . . . . . . . . . . . . . 22 Nitrogen (Blue) . . . . . . . . . . . . . 10 Sulphur (Yellow) . . . . . . . . . . . . 13 Halogen (Green) . . . . . . . . . . . . 8 Phosphorus (Purple) . . . . . . . . . . 7 Divalent Metals (Silver) . . . . . . . . 7 Trivalent Metals (Silver) . . . . . . . 7 Bonds (Large) . . . . . . . . . . . . . . 36 Bonds (Small) . . . . . . . . . . . . . . 50