About this site

This site is a free reference on the chemical elements and on high-purity materials. It combines an interactive periodic table covering all 118 elements with in-depth guides on the materials we know best: nickel wire, copper powder and lithium.

The element pages give atomic number, standard atomic weight, electron configuration, density, melting and boiling points, electronegativity, common oxidation states and the year of discovery. The material guides go one level deeper and explain what each purity grade — from 2N to 7N — actually means, which trace elements limit it and where it is used in practice.

What you will find here

• ▪An interactive periodic table of all 118 elements, in English and French
• ▪Atomic and physical property tables for every element
• ▪Purity-grade guides explaining the N notation and metals-basis assay
• ▪Typical trace impurity profiles, analysis methods and handling precautions

Accuracy

Element data follows commonly published IUPAC values; purity-grade figures are typical industry values, not a specification for any particular lot. If you spot an error, tell us and we will correct it.