ATOMIC ORBITALS Molecular Model Set, incluing: 1s; 2s; 2p; 3d; 2s+ 3 x 2p; & sp, sp2, & sp3 hybridized models..... Contains sufficient parts to make the 14 easy-to-assemble atomic orbitals shown. Pear-shaped lobes represent the two wave phases of the p and d atomic orbitals. Each model comes with its own base.