Basic information
- CAS
7440-40-6- Standard SMILES
[Bk]- InChIKey
PWVKJRSRVJTHTR-UHFFFAOYSA-N- Molecular formula
- Bk
- Average molar mass
- 247.0703 g/mol
- Monoisotopic mass
- 247.07031
Overview
Berkelium atom is an actinoid atom and a f-block element atom.
Names & identifiers
- Preferred name
- Berkelium
- IUPAC
- berkelium
- English name
- berkelium
- Molecular formula
- Bk
- Molecular weight
- 0
Names & synonyms
BERKELIUM7440-40-62YQA718KUUDTXSID70225389RefChem:119085DTXCID20147880Bkberkelium atomberkelioUNII-2YQA718KUUAtomic BerkeliumElement-Bk
Show more names
berkelium ISO 9001：2015 REACH
Element:BkBerkelium elementElement BerkeliumElement:BerkeliumBk (element)Berkelium (atomic)Berkelium (element)BERKELIUM [MI]
Database identifiers
- CAS
7440-40-6- PubChem CID
- 23971
- DTXSID
DTXSID70225389- ChEBI
CHEBI:33391- UNII
- 2YQA718KUU
- Nikkaji
- J95.870K
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 0
- Rotatable bonds
- 0
- Heavy atoms
- 1
- Formal charge
- 0
- Complexity
- 0
Experimental & physicochemical properties
Chemical ClassesPhysical/Radiation -> Radionuclides
Physical DescriptionA man-made radioactive metal with a melting point of 986 degrees C; Known isotopes have mass numbers of 240 and 242-251; Bk-247 is the isotope with the longest half life; [Merck Index # 1158]
Physicochemical properties
- Melting point
- 986 · 986 ± 25° (Fahey); mp 1050° (Katz et al., loc. cit. vol. 2, p 1150)
- Boiling point
- 2630 ℃ · ~2630℃ [KAT86]
- Density
- 14.78 · (calc) 14.78; d (calc) 13.25
- form
- hexagonal
- color
- hexagonal, hexane crystals, crystalline
- Bulk Modulus
- 52 GPa · 52.0 GPa
- FDA UNII
- 2 YQA718KUU · 2YQA718KUU
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
Hazard information
Hazards Summary
Most Important Radionuclide: Bk-247 Source: Nuclear reactors or particle accelerators; Half-Life: 1,400 years Specific Activity (mCi/gm): 1.1 Decay Mode: Alpha Internal Toxicity: Very High Annual Limit on Intake: 0.0000009 mCi Average Radiation Energy (MeV): Alpha 5.6; Beta 0.061; Gamma 0.11; [Argonne] [See Glossary for references.] See Radiation, ionizing.
Chemistry & industry
Uses & manufacturing
UsesBk-247 is one of the transuranic wastes (TRU) produced in nuclear reactors by neutron capture. [Argonne]
Applications
HistoryBerkelium [CAS: 7440-40-6], the atomic number is 97 and the chemical symbol is Bk. The name is derived from Berkeley, the town in California where the element was first synthesized in 1949 by the American scientific team Stanley G. Thompson, Albert Ghiorso, and Glenn T. Seaborg at the University of California, Berkeley, CA., using the nuclear reaction 241Am(4He, 2n) 243Bk. It is the eighth element in the Actinide series of the elements and was named in analogy with Terbium (for Ytterby the town in Sweden whose mine produced the ore), which is the eighth element in the Lanthanide series of the elements. The longest half-life associated with this unstable element is 1400 year 247Bk. See also Berkelium.
UsesBerkelium has no practical applications.
Suppliers1 total
陕西缔都医药化工有限公司+86-29-81139210 +86-17392587031 · [email protected]
Additional notes
DefinitionChEBI: Berkelium atom is an actinoid atom and a f-block element atom.
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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