Element Berkelium

Berkelium ElementIt is a member of the actinide and transuranium element series. It is named after the city of Berkeley, California, the location of the Lawrence Berkeley National Laboratory (then the University of California Radiation Laboratory) where it was discovered in December 1949.
Berkelium was the fifth transuranium element discovered after neptunium, plutonium, curium and americium.
Berkelium is a transuranic radioactive chemical element with the symbol Bk and atomic number 97.
Berkelium is a soft, silvery-white, radioactive actinide metal. In the periodic table, it is located to the right of the actinide curium, to the left of the actinide californium and below the lanthanide terbium with which it shares many similarities in physical and chemical properties

Names and Identifiers

Chemical Formula:Bk
CAS:7440-40-6
Molecular Weight:247.00000 g/mol
EC Number :n/a
MDL Number:n/a
Color:silvery-white/ unknown
Other Names:Berkelio, Berquélio
PubChem CID:23971
IUPAC Name:Berkelium
Inchl:InChI=1S/Bk
InChI Key:PWVKJRSRVJTHTR-UHFFFAOYSA-N
Canonical SMILES:[Bk]
ICSC Number:n/a

Physical & Chemical Properties

Phase:Solid
Density:14.78 g/cm³
Boiling Point:2900 K ​(2627 °C, ​4760 °F)
Melting Point:1259 K ​(986 °C, ​1807 °F)
Molecular Formula:Bk
Flash Point:n/a
Exact Mass:247.07000

About twenty isotopes and six nuclear isomers (excited states of an isotope) of berkelium have been characterized with the mass numbers ranging from 233 to 253 (except 235)

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
245Bk245.066364.94 dEC to 245Cm; α to 241Am3/2
246Bk246.06871.80 dEC to 246Cm; α to 242Am2
247Bk247.070300 (6)1400 yα to 243Am3/2
248Bk248.0731023.7 hEC to 248Cm; α to 244Am; β to 248Cf1
249Bk249.07498320 dα to 245Am; β to 249Cf; SF7/22.0
250Bk250.078313.217 hβ to 250Cf2

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