Periodic Table
T-Shirts & more
from the

Merch Store

previous home next

The INTERNET Database of Periodic Tables

There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D.

Use the drop menus below to search & select from the more than 1100 Period Tables in the database:

  Text Search:       

Periodic Tables from the year 1798:

1798   Discovery of Beryllium
1798   Discovery of Chromium


Discovery of Beryllium


Beryllium, atomic number 4, has a mass of 9.012 au.

Beryllium is a metal with a high melting point. At ordinary temperatures it resists oxidation in air. Beryllium compounds are very toxic.

Beryllium was first observed or predicted in 1798 by N. Vauquelin and first isolated in 1828 by F. Wöhler and A. Bussy.

Top of Page


Discovery of Chromium


Chromium, atomic number 24, has a mass of 51.996 au.

Chromium was first observed or predicted in 1797 by N. Vauquelin and first isolated in 1798 by N. Vauquelin.

Top of Page

previous home next
What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

Queries, Suggestions, Bugs, Errors, Typos...

If you have any:

Suggestions for links
Bug, typo or grammatical error reports about this page,

please contact Mark R. Leach, the author, using

This free, open access web book is an ongoing project and your input is appreciated.