The black 5 hole trigonal bipyramidal atom is used to represent the dsp3 hybridization of carbon.
Indigo Instruments has maintained a substantial inventory of genuine Molymod atoms & bonds for over 30+ years. These parts are compatible with every set & kit we have sold since day 1. Though quality may appear expensive, no parts support from other vendors costs even more.
Use only these genuine Molymod Atoms & Bonds for full compatibility with any of our Molymod Molecular Model Sets & Molymod Molecular Model Kits.
These parts are a useful addition to the kits I already own. They came as requested. It is very important that individual parts are available because teachers have different needs. In my case I use a lot of visual-evidence based teaching in my organic chemistry classes. I have a need for a very wide range of models when filming/photographing reactions. The semi-space filling Molymod models play important roles in that process. (There will be similar statements on the other individual parts I ordered).