This pack of metallic grey atoms are used to represent metal atoms and is for extending your existing set or for replacing lost atoms. Each pack contains 10 balls with five holes in a trigonal bipyramidal arrangement. Each atom is 23 mm diameter.
Why would I need these? You could use them to represent a trigonal bipyamidal metal such as iron in [Fe(CO)5].
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.