Bonding and Structure Model Set, Immense help when learning organic chemistry, Has some very unique features, Among the 220 durable plastic components, there are a large variety of atom models with different orbital hybridizations, Has flexible and rigid links
Notebook Charts, Particle Set of 30 Placement Sized Charts 16 X 11inch, ncludinchg more about neutrinchos and a section on Unsolved Mysteries inchcludinchg dark matter and dark energy