// MATTER · ELEMENT 97 / 118atoms.no/elements
Bk97
Berkelium
Bk·Z 97·Actinide·247·⭕ 5A · C Minor
▸ The reading
interpretive · artBerkelium is named for the city where the cyclotron age filled the table — more transuranium elements from neptunium to lawrencium first appeared at Berkeley than anywhere else. Available only by the milligram, it serves mainly as a stepping-stone target for making elements heavier still. A seat whose job is being climbed past.
The science below is cited as science; the symbolic layers are flagged as interactive art.
⚜ Periodic Frequency
5AC Minor
a seat struck in brass — testimony, not prediction
the seat has its own room on ⭕ THE OVAL TABLE — tap the code
▸ The lenses
▸ Discovery
Stanley Thompson + Glenn Seaborg + Albert Ghiorso — Berkeley cyclotron · United States · 1949
▸ Stellar origin
Human-madeProduced by sustained neutron bombardment of curium in reactors. Long-lived isotope ²⁴⁷Bk has a 1380-year half-life.
▸ Reactivity
Available only in milligram quantitiesSynthesis takes years of reactor irradiation. Berkelium chemistry is performed on samples that fit on a pinhead.
▸ Applications
- Heavy-element synthesis (target for Ts, Bh)
- Nuclear-physics research
- (No commercial applications)
- (No practical bulk uses)
▸ Curiosity
Named for Berkeley — the city where more transuranium elements from Np to Lr were first made than anywhere else, several on the same cyclotron that made berkelium.
▸ Related readings
a resonance drawn between readings — not a claim that they share an origin.