Build large-scale models the whole class can see!
By inserting radial, polar and tetrahedral pegs into the spheres you can make any bond angle which can then be joined with either rigid aluminium or flexible vinyl bonds. New to the system are electron orbitals to show VSEPR theory and to represent lone pairs.
Packs of individual atoms, pegs and bonds are available to order for making custom models for studying specific crystals and lattices.
Click here to order parts for custom sets in the Unit system.