Shelfmark

Grg.6

Maker

Griffin & George Limited

Subjects

chemistry; demonstration (teaching models of chemical structures)

Title

Instruction Sheet: Making models of chemical structures using Griffin ‘Grifzote’ spheres

Description

Description of polystyrene spheres used to make models of chemical structures.
- General description of the spheres.
- Description of 2 types of model: tangential contact models for modelling atoms and molecules of elements and compounds (both organic and inorganic), and space-filling models to indicate how electron clouds overlap in space.
- Practical details of model construction.
- Photographs of the models depicting various molecules.
- Geometric diagram of the tangential contact and space-filling molecules as illustrated by the water molecule H20.
- Geometric diagrams of marking spheres at the most common angles and of marking out tetrahedrally with protractor.
- Paper patten details for space filling model of the formaldehyde molecule CH20, and for a benzene ring.
- Tables of covalent, ionic and Van der Waal’s radii; of some common structures; and of the Institute of Physics colour code for the models
- References and useful reference books
- Addenda: techniques for connecting the spheres together and for marking out speheres using dividers instead of a protractor.

Earliest Date

1964

Latest Date

Pages

None

Address

Head Office: Ealing Road, Alperton, Wembley, Middlesex

Other Makers

Author: C. V. Plattes B.Sc.

Cat no

S33-390/ I.S. 1181/6701

Contents List

Hardback

Prices

Index

Illustrations

Yes

General Ref