berkelium is american
berkelium is synthetic
Berkelium is not corrosive.
Berkelium is extremely rare, radioactive and unstable; berkelium is not for sale.
Berkelium has a silvery appearance.
Berkelium has two electrons on the outer shell.
Any item has berkelium inside.
Berkelium is not a commercial product.
Berkelium has a silvery appearance.
Berkelium has 97 electrons.
Berkelium is an artificial element.
Berkelium has 97 electrons.
We haven't berkelium in the body.