Organic and Inorganic Chemistry Molecular Atomic Model Set - 520 Pieces with Hard Plastic Case. 370 Atoms & 150 bonds. This set consists of the following Atoms :Carbon (black)- 60, Oxygen (red) - 30, Metal (yellow) - 20, Divalent Metals (orange) - 30, Non-Metals (blue)- 30, Hydrogen (white) -125, Halogen (green) - 25, Monovalent Metals (orange) - 20, Trivalent Metals (yellow) - 30, and Bonds 150. This set is prefect for constructing complex organic and inorganic molecules. Includes durable hard plastic box.