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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: 

  Text Search:       




Year:  2016 PT id = 719, Type = data misc

Collective Work of Chemists

From an article on LinkedIn:

Twelve elements were known from the Ancient Times, and were described by Romans and Greeks. The remaining 106 elements have been discovered by scientists of 15 different countries during the last 4 centuries. In addition, 19 elements of those 106 (18%) have been co-discovered by researchers of two countries.

Although some of them (like Bromine or Thallium) were isolated separately at the same time by chemists of different nationalities within the race to discover new elements in 18th-21st centuries, most of them have been obtained since then through collaborative research, like the recently discovered Ununpentium, Ununseptium and Ununoctium.

Another example is the isolation of Radium and Polonium by the Polish Maria Skłodowska-Curie and her French husband, Pierre Curie.

Thus, Periodic Table is the result of a collective and long-term work of hundreds of scientists.

It is noteworthy to see that Russia and United States have discovered mainly artificial elements.

Collective Work of Chemists

Collective Work of Chemists

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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