This pack contain 10 black balls representing carbon atoms, for instance, and the diameter of each atom is 23 mm. Each atom has four holes arranged at 109.5° (tetrahedral) meaning four bonds may be represented. If you want to make only two bonds (as in ethyne for instance) or three bonds (as in ethene for instance) we also supply black 2- and 3-hole atoms with the holes appropriately positioned.
Why would I need these? You could use them to represent a carbon atom in a compound such as methane in which the HCC angles are 109.5°.
This pack is for extending an existing set or for replacing lost parts.
The Molymod® system is the original, unique, dual-scale system of high quality low-cost molecular models. These enormously popular sets are ideal for students but are also used by scientists all over the world.