Berkelium is a solid metal, man made, radioactive, dense, without practical uses now, atomic number 97, chemical symbol Bk, etc.
Berkelium is an artificial element.
Berkelium is a chemical element, not first or second.
Berkelium is a chemical element containing as any other elements protons, neutrons and electrons.
Berkelium is an artificial element.
We haven't berkelium in the body.
Berkelium is not a commercial product.
Berkelium is on the periodic table. If it's on the periodic table, it's an element.
The atomic number of berkelium is 97.
Berkelium is only an artificial element.
Berkelium is an artificial chemical element.
Berkelium is a chemical element, doesn't contain other compounds.
Berkelium is a unique chemical element.