Molecular Model Deluxe. With 520 pieces that include 245 atoms, 125 hydrogen atoms with connected bonds, and 150 additional bonds.

GSC International Molecular Model Deluxe #1863. With 520 pieces that include 245 atoms, 125 hydrogen atoms with connected bonds, and 150 additional bonds. The kit has been designed to assist chemical education through university levels. Tapered plastic bonding rods help to simplify the construction process. Included in this set are 520 pieces that include 245 atoms, 125 hydrogen atoms with connected bonds and 150 various size bonds. as well as one model of sulfuric acid. The kit is provided with a comprehensive guide. Includes: 30 blue Trivalent/Pentavalent, 25 green Monovalent Halogen, 20 orange Monovalent Sodium/Potassium, 30 orange Bivalent Calcium/Magnesium, 20 yellow Sulfur/Selenium, 30 black Alkane Carbon, 20 black Alkene Carbon, 10 black Alkyne Carbon, 30 red Bivalent Oxygen, 30 yellow Aluminum/Chromium, 128 white Hydrogen atoms with bonds, 164 bonding lugs in 3 sizes. Encourages Chemistry Concept Mastery: The kit includes various atoms and bonding types, making it perfect for l