A synthetic Trans Uranium Actinoid,
a product that natural elements exceed.
It can occur as by-product in small amount,
but those masses are difficult to count.

It was willingly produced for analysis,
to understand its nature and physis.
To produce twenty two miligrams pure Berkelium
two hundred fifty days of alpha bombarding on Curium.

Ninety days of purification required,
for the analysis desired.
There is no application for this, as production is insane,
it is another silvery white metal, rather plain.

There are stable isotopes existing many years,
mainly alpha radiators it appears.
Berkelium was once precursor,
with masses even more.

Super heavy element creation,
for the trans Uranium series exploration,
Since it was not produced any more,
as there is not much use for.

Berkelium is a part of the post world war history,
not quite save but full of motivation energy,
scientists explored the possibilities,
and the problem of concentrated energies.

A piece in the scientific progress,
and part of our development process.
So little amount that ever existed,
but it would be missed if it was not listed.