Unit Large Scale Models - Great for Teaching/Classroom

Easy to See In Larger College or High School Lectures

Classroom Demonstration Models

Unit style molecular models with 45mm diameter atoms. Really BIG models visible in large Lecture Halls.

Unit style molecular models are our most versatile. They can be used for organic/inorganic, VSEPR, point group or lattice structures. Unit atoms are 45mm diameter & make giant models visible at the back of large lecture halls.

Unit atoms were designed for crystal lattice and are configurable for 1-6, 8 & 12 coordinate geometries.

More Information

The Unit system is unique in that any atom can take on any geometry. Below are just a few of the ways the atoms & pegs can be combined.

Bond Pegs & Atom Geometries Examples of Where Used
Unit Pegs Polar Pegs (On Right)
1.One at each pole for linear atoms
2.Use with 3 Radial pegs for Tri-Bi

Radial Pegs (Middle)
1.Use 2 for 30, 45, 90, 120 or 180 degree

Angled Pegs (On Left)
1.Use 4 for tetrahedral geometry
2.Use 8 for 8 coordinate
Unit Geometries Left Column: Tetrahedral with 4 angled (4/8 )

Centre Column: Tri-Bi with 3 radial, 2 polar

Right Column: Octahedral w/ 4 radial, 2 polar



Any Unit atom can show univalence using 1 of the 3 different pegs. Combinations of these 3 pegs can produce any geometry from divalent to trigonal up to octahedral.

Watch the video below to see how easy it is to make any molecular geometry from any Unit atom.

Univalent Atoms


Divalent Atoms


Trigonal/Trigonal Bipyramidal Atoms




Tetrahedral/Trigonal Pyramidal Atoms