Berkelium

Berkelium (Bk)

grundämne
Atomnummer97
Atommassa247
masstal233
Grupp
Period7
Blockf
Protoner97 p+
Neutroner136 n0
Electrons97 e-
Berkelium metal.jpg Animated Bohrs atommodell of Bk (Berkelium) Enhanced Bohrs atommodell of Bk (Berkelium) Bohrs atommodell: Bk (Berkelium) Orbital Diagram of Bk (Berkelium)

Egenskaper

atomradie
molvolym
kovalent radie
168 pm
Metallic Radius
ionic radius
96 pm
Crystal Radius
110 pm
Van der Waalsradie
244 pm
densitet
14,78 g/cm³
energi
proton affinity
Elektronaffinitet
joniseringsenergi
ångbildningsvärme
smältvärme
Bildningsentalpi
310 kJ/mol
Electrons
electron shell2, 8, 18, 32, 27, 8, 2
valenselektron4
elektronkonfiguration[Rn] 5f9 7s2
oxidationstal2, 3, 4, 5
elektronegativitet
Electrophilicity
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
Smältpunkt
1 259,15 K
critical pressure
critical temperature
trippelpunkt
Visual
färg
Färglös
appearancesilvery
Brytningsindex
materialegenskap
Värmeledningsförmåga
termisk expansion
molar heat capacity
Specifik värmekapacitet
heat capacity ratio
electrical properties
type
elektrisk konduktivitet
resistivitet
supraledare
magnetism
type
magnetisk susceptibilitet (Mass)
magnetisk susceptibilitet (Molar)
magnetisk susceptibilitet (Volume)
magnetic ordering
Curiepunkten
Néel temperature
Structure
KristallstrukturEnkelt hexagonalt ()
Gitterkonstant
Lattice Anglesπ/2, π/2, 2 π/3
mekanisk materialegenskap
hårdhet
Kompressibilitet
skjuvmodul
Young's modulus
Poissons konstant
ljudhastighet
klassificering
KategoriAktinider, Actinides
CAS Group
IUPAC Group
Glawe Number41
Mendeleev Number30
Pettifor Number40
Geochemical Class
Goldschmidt classificationsynthetic
övrigt
Gas Basicity
Dipole Polarizability
125 ± 25 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
710
Neutron Mass Absorption
kvanttal6H15/2
rymdgrupp194 (P63/mmc)

Berkeliumisotoper

Stabila isotoper0
Instabila isotoper22
Radioactive Isotopes22

233Bk

natural abundanceRadioactive ☢️
relative atomic mass
233,056652 ± 0,00025 Da
masstal233
g-factor
Halveringstid
40 ± 30 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2015
Paritet-

233Bk Decay Modes
decay modeIntensitet
α (α emission)82%
β+ (β+ decay; β+ = ϵ + e+)%

234Bk

natural abundanceRadioactive ☢️
relative atomic mass
234,057322 ± 0,000164 Da
masstal234
g-factor
Halveringstid
20 ± 5 s
Spinn3
nuclear quadrupole moment
upptäcktsdatum2003
Paritet-

234Bk Decay Modes
decay modeIntensitet
α (α emission)80%
β+ (β+ decay; β+ = ϵ + e+)20%

235Bk

natural abundanceRadioactive ☢️
relative atomic mass
235,056651 ± 0,00043 Da
masstal235
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum
Paritet-

235Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%

236Bk

natural abundanceRadioactive ☢️
relative atomic mass
236,057479 ± 0,000387 Da
masstal236
g-factor
Halveringstid
26 ± 10 s
Spinn4
nuclear quadrupole moment
upptäcktsdatum2017
Paritet+

236Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)%
β+ SF (β+-delayed fission)0.04%

237Bk

natural abundanceRadioactive ☢️
relative atomic mass
237,057123 ± 0,000247 Da
masstal237
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum
Paritet-

237Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%

238Bk

natural abundanceRadioactive ☢️
relative atomic mass
238,058204 ± 0,000275 Da
masstal238
g-factor
Halveringstid
2,4 ± 0,08 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1994
Paritet

238Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)%
β+ SF (β+-delayed fission)0.048%

239Bk

natural abundanceRadioactive ☢️
relative atomic mass
239,058239 ± 0,000222 Da
masstal239
g-factor
Halveringstid
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1989
Paritet+

239Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.01%
SF (spontaneous fission)0.01%

240Bk

natural abundanceRadioactive ☢️
relative atomic mass
240,059758 ± 0,000161 Da
masstal240
g-factor
Halveringstid
4,8 ± 0,8 m
Spinn7
nuclear quadrupole moment
upptäcktsdatum1980
Paritet-

240Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%
β+ SF (β+-delayed fission)0.002%

241Bk

natural abundanceRadioactive ☢️
relative atomic mass
241,060098 ± 0,000178 Da
masstal241
g-factor
Halveringstid
4,6 ± 0,4 m
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum2003
Paritet+

241Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%

242Bk

natural abundanceRadioactive ☢️
relative atomic mass
242,061999 ± 0,000144 Da
masstal242
g-factor
Halveringstid
7 ± 1,3 m
Spinn3
nuclear quadrupole moment
upptäcktsdatum1972
Paritet+

242Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ SF (β+-delayed fission)3%
α (α emission)%

243Bk

natural abundanceRadioactive ☢️
relative atomic mass
243,063005905 ± 0,000004856 Da
masstal243
g-factor
Halveringstid
4,6 ± 0,2 h
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1950
Paritet-

243Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.15%

244Bk

natural abundanceRadioactive ☢️
relative atomic mass
244,065178969 ± 0,000015457 Da
masstal244
g-factor
Halveringstid
5,02 ± 0,03 h
Spinn4
nuclear quadrupole moment
upptäcktsdatum1972
Paritet-

244Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)0.006%

245Bk

natural abundanceRadioactive ☢️
relative atomic mass
245,066359814 ± 0,000001923 Da
masstal245
g-factor
Halveringstid
4,95 ± 0,03 d
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1951
Paritet-

245Bk Decay Modes
decay modeIntensitet
ϵ (electron capture)99.88%
α (α emission)0.12%

246Bk

natural abundanceRadioactive ☢️
relative atomic mass
246,0686713 ± 0,000064433 Da
masstal246
g-factor
Halveringstid
1,8 ± 0,02 d
Spinn2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet

246Bk Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)%

247Bk

natural abundanceRadioactive ☢️
relative atomic mass
247,070305889 ± 0,00000557 Da
masstal247
g-factor
Halveringstid
1,38 ± 0,25 ky
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1965
Paritet-

247Bk Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)%

248Bk

natural abundanceRadioactive ☢️
relative atomic mass
248,073141689 ± 0,000053739 Da
masstal248
g-factor
Halveringstid
Spinn6
nuclear quadrupole moment
upptäcktsdatum1956
Paritet+

248Bk Decay Modes
decay modeIntensitet
α (α emission)%
ϵ (electron capture)%

249Bk

natural abundanceRadioactive ☢️
relative atomic mass
249,074983118 ± 0,000001339 Da
masstal249
g-factor
0,57142857142857 ± 0,11428571428571
Halveringstid
327,2 ± 0,3 d
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet+

249Bk Decay Modes
decay modeIntensitet
β (β decay)100%
α (α emission)0.00145%
SF (spontaneous fission)47%

250Bk

natural abundanceRadioactive ☢️
relative atomic mass
250,078317195 ± 0,00000311 Da
masstal250
g-factor
Halveringstid
3,212 ± 0,005 h
Spinn2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet-

250Bk Decay Modes
decay modeIntensitet
β (β decay)100%

251Bk

natural abundanceRadioactive ☢️
relative atomic mass
251,080760555 ± 0,000011523 Da
masstal251
g-factor
Halveringstid
55,6 ± 1,1 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1967
Paritet-

251Bk Decay Modes
decay modeIntensitet
β (β decay)100%

252Bk

natural abundanceRadioactive ☢️
relative atomic mass
252,08431 ± 0,000215 Da
masstal252
g-factor
Halveringstid
1,8 ± 0,5 m
Spinn
nuclear quadrupole moment
upptäcktsdatum1988
Paritet

252Bk Decay Modes
decay modeIntensitet
β (β decay)%
α (α emission)%

253Bk

natural abundanceRadioactive ☢️
relative atomic mass
253,08688 ± 0,000385 Da
masstal253
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1991
Paritet-

253Bk Decay Modes
decay modeIntensitet
β (β decay)%

254Bk

natural abundanceRadioactive ☢️
relative atomic mass
254,0906 ± 0,00032 Da
masstal254
g-factor
Halveringstid
Spinn
nuclear quadrupole moment
upptäcktsdatum
Paritet

254Bk Decay Modes
decay modeIntensitet
β (β decay)%

historia

upptäckare eller uppfinnareG.T.Seaborg, S.G.Tompson, A.Ghiorso
fyndplatsUnited States
upptäcktsdatum1949
etymologiNamed after Berkeley, California the city of its discovery.
uttalBURK-li-em (engelska)

Sources

Förekomst
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body
0 %
Abundance in Meteor
0 %
Abundance in Sun
0 %
Abundance in Universe
0 %

Nuclear Screening Constants