Box contains: Hydrogen (1 hole, 30 units, white), Carbon (4 holes, 15 units, black), Oxygen (2 holes, 10 units, red), Nitrogen (3 holes, 4 units, sky-blue), Sulfur (6 holes, 4 units, yellow), Phosphorus (5 holes, 5 units, purple), Fluorine (1 hole, 2 units, orange), Chlorine (1 hole, 8 units, green), Bromine (5 holes, 2 units, blue), Iodine (5 holes, 2 units, dark-purple), Metal (3 holes, 2 units, grey), Boron (6 holes, 2 units, grey), Single covalent bonds (60 units, light-grey), Double triple covalent bonds (25 units, grey-green), Compact single covalent bonds (60 units, transparent), Compact double covalent bonds (8 units, white), Molecular tool (1 unit).
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