Plutonium is one of the most complex and mysterious elements known to science.

Carbon is one of the few elements known since antiquity.

It is the lightest solid element known, specific gravity being 0.59.

It is the heaviest element known to be used by any living organism.

The discovery of the elements known to exist today is presented here in chronological order.

A short section is given to each of some 115 elements known to science.

Finally the last of the natural elements was left behind, all 104 elements known to man were shown, and many others.

The table had all of the elements known at the time.

Mercury, the only element known to be liquid at room temperature, was a metal.

Someone once suggested that poverty is the most toxic element known to humankind.