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: Dr Mark R Leach.
Use the buttons below to select from the 1000+ Periodic Tables in the database:
Elements - noble gases and covalently bonded
gaseous molecules. The atoms and molecules are attracted by weak van
der Waals forces and so these elements remain gaseous at room temperature.
- Those elements which form ionic bonds generally have filled outer
electron shells. They typically bond to oxygen in silicates and oxides.
- The metals near iron in the periodic table that exhibit metallic bonding,
have a weak affinity for oxygen and sulfur and are readily soluble in
molten iron. Examples include iron, nickel, cobalt, platinum, gold,
tin, and tantalum. These elements are depleted in the earth crust because
they have partitioned into the earth's iron core.
- The elements that bond to S, Se, Te, Sb, and As. These bonds are predominantly
covalent in character.
As discussed in
more detail here.
By Mark Leach
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© Mark R. Leach 1999-
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