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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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7000 BCE

Discovery of Lead

Pb

Lead, atomic number 82, has a mass of 207.2 au.

Lead had its earliest use in about 7000 BCE, and the oldest sample dates from 3800 BCE. It was discovered by Africa and the earliest sample is from Abydos, Egypt.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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