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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 1300 Period Tables in the database: 

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Year:  1808 PT id = 5, Type = formulation data

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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© Mark R. Leach Ph.D. 1999 –


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