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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:

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Periodic Table formulations from the year 1808:

1808   Dalton's Elements
1808   Discovery of Boron
1808   Discovery of Magnesium
1808   Discovery of Calcium
1808   Discovery of Strontium
1808   Discovery of Barium


1808

Dalton's Elements

Two pages from John Dalton's A New System of Chemical Philosophy in which he proposed his version of atomic theory based on scientific experimentation (see the scanned book, page 219):

Name Modern Symbol Dalton's Data Modern Values % error
Hydrog. H 1 1 0%
Azote N 5 14 -180%
Carbone C 5 12 -140%
Oxygen O 7 16 -129%
Phosphorus P 9 31 -244%
Sulphur S 13 32.1 -147%
Magnesia Mg 20 24.3 -22%
Lime Ca 24 40.1 -67%
Soda Na 28 23 18%
Potash K 42 39.1 7%
Strontites Sr 46 87.6 -90%
Barytes Ba 68 137.3 -102%
Iron Fe 50 55.8 -12%
Zinc Zn 56 65.4 -17%
Copper Cu 56 63.5 -13%
Lead Pb 90 200.6 -123%
Silver Ag 190 107.9 43%
Gold Au 190 197 -4%
Platina Pt 190 195.1 -3%
Mercury Hg 167 200.6 -20%

By Mark Leach

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1808

Discovery of Boron

B

Boron, atomic number 5, has a mass of 10.814 au.

Boron has properties that are borderline between metal and non-metal (semimetallic).

Boron was first observed or predicted in 1808 by L. Gay-Lussac and L.J. Thénard and first isolated in 1808 by H. Davy.

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1808

Discovery of Magnesium

Mg

Magnesium, atomic number 12, has a mass of 24.306 au.

Magnesium is a Group 2 element, and these are called: "alkaline earth metals".

Magnesium was first observed or predicted in 1755 by J. Black and first isolated in 1808 by H. Davy.

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1808

Discovery of Calcium

Ca

Calcium, atomic number 20, has a mass of 40.078 au.

Calcium is a Group 2 element, and these are called: "alkaline earth metals".

Calcium was first isolated in 1808 by H. Davy.

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1808

Discovery of Strontium

Sr

Strontium, atomic number 38, has a mass of 87.62 au.

Strontium is a Group 2 element, and these are called: "alkaline earth metals".

Strontium was first observed or predicted in 1787 by W. Cruikshank and first isolated in 1808 by H. Davy.

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1808

Discovery of Barium

Ba

Barium, atomic number 56, has a mass of 137.327 au.

Barium is a Group 2 element, and these are called: "alkaline earth metals".

Barium was first observed or predicted in 1772 by W. Scheele and first isolated in 1808 by H. Davy.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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