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 Table formulations from the year 1898:

1898   Crookes' vis generatrix
1898   Discovery of Neon
1898   Discovery of Krypton
1898   Discovery of Xenon
1898   Discovery of Polonium
1898   Discovery of Radium


1898

Crookes' vis generatrix

Model of Crookes’ vis generatrix of 1898, built by his assistant, Gardiner. From: Proc. R. Soc. Lond. 63, 408.

The vertical scale represents the atomic weight of the elements from H = 1 to Ur = 239.

Missing elements are represented by a white circle. Similar elements appear underneath each other:

Cutting Board

Top of Page


1898

Discovery of Neon

Ne

Neon, atomic number 10, has a mass of 20.18 au.

Neon is a noble gas. It is present in the atmosphere, 1 part in 65000.

Neon was first isolated in 1898 by W. Ramsay and W. Travers.

Top of Page


1898

Discovery of Krypton

Kr

Krypton, atomic number 36, has a mass of 83.798 au.

Krypton is a noble gas.

Krypton was first isolated in 1898 by W. Ramsay and W. Travers.

Top of Page


1898

Discovery of Xenon

Xe

Xenon, atomic number 54, has a mass of 131.293 au.

Xenon is a noble gas.

Xenon was first isolated in 1898 by W. Ramsay and W. Travers.

Top of Page


1898

Discovery of Polonium

Po

Polonium, atomic number 84, has a mass of 209 au.

Radioactive element.

Polonium was first observed or predicted in 1898 by P. and M. Curie and first isolated in 1902 by W. Marckwald.

Top of Page


1898

Discovery of Radium

Ra

Radium, atomic number 88, has a mass of 226 au.

Radioactive element.

Radium was first observed or predicted in 1898 by P. and M. Curie and first isolated in 1902 by M. Curie.

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:

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

please contact Mark R. Leach, the author, using mark@meta-synthesis.com

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