Berkeli

Berkeli (Bk)

element with the atomic number of 97
Atomic Number97
Atomic Weight247
Rhif màs233
Group
Period7
Blockf
Proton97 p+
Niwtron136 n0
Electron97 e-
Animated Bohr model of Bk (Berkeli)

Nodwedd Ffisegol

Atomic Radius
molar volume
covalent radius
168 pm
Metallic Radius
ionic radius
96 pm
Crystal Radius
110 pm
Van der Waals radius
244 pm
density
14.78 g/cm³

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
ionization energy of Bk (Berkeli)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
310 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 32, 27, 8, 2
Bohr model: Bk (Berkeli)
valence electron2
Lewis structure: Bk (Berkeli)
trefn yr electronnau[Rn] 5f9 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f9 7s2
Enhanced Bohr model of Bk (Berkeli)
Orbital Diagram of Bk (Berkeli)
Cyflwr ocsidiad2, 3, 4, 5
Electronegatifedd
Electrophilicity Index
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
Melting Point
1,259.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Colorless
appearancesilvery
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
dargludedd trydanol
Gwrthedd
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureSimple Hexagonal ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number41
Mendeleev Number30
Pettifor Number40
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
125 ± 25 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
710
Neutron Mass Absorption
quantum number6H15/2
space group194 (P63/mmc)

Isotopes of Berkelium

Stable Isotopes0
Unstable Isotopes22
Natural Isotopes0

233Bk

Rhif màs233
neutron number136
relative atomic mass
233.056652 ± 0.00025 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
40 ± 30 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod2015
parity-

decay modeintensity
α (α emission)82%
β+ (β+ decay; β+ = ϵ + e+)

234Bk

Rhif màs234
neutron number137
relative atomic mass
234.057322 ± 0.000164 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
20 ± 5 s
spin3
nuclear quadrupole moment
dyddiad darganfod2003
parity-

decay modeintensity
α (α emission)80%
β+ (β+ decay; β+ = ϵ + e+)20%

235Bk

Rhif màs235
neutron number138
relative atomic mass
235.056651 ± 0.00043 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

236Bk

Rhif màs236
neutron number139
relative atomic mass
236.057479 ± 0.000387 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
26 ± 10 s
spin4
nuclear quadrupole moment
dyddiad darganfod2017
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)
β+ SF (β+-delayed fission)0.04%

237Bk

Rhif màs237
neutron number140
relative atomic mass
237.057123 ± 0.000247 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

238Bk

Rhif màs238
neutron number141
relative atomic mass
238.058204 ± 0.000275 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.4 ± 0.08 m
spin1
nuclear quadrupole moment
dyddiad darganfod1994
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)
β+ SF (β+-delayed fission)0.048%

239Bk

Rhif màs239
neutron number142
relative atomic mass
239.058239 ± 0.000222 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin7/2
nuclear quadrupole moment
dyddiad darganfod1989
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.01%
SF (spontaneous fission)0.01%

240Bk

Rhif màs240
neutron number143
relative atomic mass
240.059758 ± 0.000161 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.8 ± 0.8 m
spin7
nuclear quadrupole moment
dyddiad darganfod1980
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)
β+ SF (β+-delayed fission)0.002%

241Bk

Rhif màs241
neutron number144
relative atomic mass
241.060098 ± 0.000178 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.6 ± 0.4 m
spin7/2
nuclear quadrupole moment
dyddiad darganfod2003
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

242Bk

Rhif màs242
neutron number145
relative atomic mass
242.061999 ± 0.000144 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7 ± 1.3 m
spin3
nuclear quadrupole moment
dyddiad darganfod1972
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ SF (β+-delayed fission)3%
α (α emission)

243Bk

Rhif màs243
neutron number146
relative atomic mass
243.063005905 ± 0.000004856 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.6 ± 0.2 h
spin3/2
nuclear quadrupole moment
dyddiad darganfod1950
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.15%

244Bk

Rhif màs244
neutron number147
relative atomic mass
244.065178969 ± 0.000015457 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.02 ± 0.03 h
spin4
nuclear quadrupole moment
dyddiad darganfod1972
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)0.006%

245Bk

Rhif màs245
neutron number148
relative atomic mass
245.066359814 ± 0.000001923 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.95 ± 0.03 d
spin3/2
nuclear quadrupole moment
dyddiad darganfod1951
parity-

decay modeintensity
ϵ (electron capture)99.88%
α (α emission)0.12%

246Bk

Rhif màs246
neutron number149
relative atomic mass
246.0686713 ± 0.000064433 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.8 ± 0.02 d
spin2
nuclear quadrupole moment
dyddiad darganfod1954
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)

247Bk

Rhif màs247
neutron number150
relative atomic mass
247.070305889 ± 0.00000557 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.38 ± 0.25 ky
spin3/2
nuclear quadrupole moment
dyddiad darganfod1965
parity-

decay modeintensity
α (α emission)100%
SF (spontaneous fission)

248Bk

Rhif màs248
neutron number151
relative atomic mass
248.073141689 ± 0.000053739 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin6
nuclear quadrupole moment
dyddiad darganfod1956
parity+

decay modeintensity
α (α emission)
ϵ (electron capture)

249Bk

Rhif màs249
neutron number152
relative atomic mass
249.074983118 ± 0.000001339 Da
g-factor
0.57142857142857 ± 0.11428571428571
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
327.2 ± 0.3 d
spin7/2
nuclear quadrupole moment
dyddiad darganfod1954
parity+

decay modeintensity
β (β decay)100%
α (α emission)0.00145%
SF (spontaneous fission)47%

250Bk

Rhif màs250
neutron number153
relative atomic mass
250.078317195 ± 0.00000311 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.212 ± 0.005 h
spin2
nuclear quadrupole moment
dyddiad darganfod1954
parity-

decay modeintensity
β (β decay)100%

251Bk

Rhif màs251
neutron number154
relative atomic mass
251.080760555 ± 0.000011523 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
55.6 ± 1.1 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1967
parity-

decay modeintensity
β (β decay)100%

252Bk

Rhif màs252
neutron number155
relative atomic mass
252.08431 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.8 ± 0.5 m
spin
nuclear quadrupole moment
dyddiad darganfod1988
parity

decay modeintensity
β (β decay)
α (α emission)

253Bk

Rhif màs253
neutron number156
relative atomic mass
253.08688 ± 0.000385 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod1991
parity-

decay modeintensity
β (β decay)

254Bk

Rhif màs254
neutron number157
relative atomic mass
254.0906 ± 0.00032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod
parity

decay modeintensity
β (β decay)
Berkelium metal

hanes

darganfyddwr neu ddyfeisiwrG.T.Seaborg, S.G.Tompson, A.Ghiorso
man darganfodUnited States
dyddiad darganfod1949
geirdarddiadNamed after Berkeley, California the city of its discovery.
ynganiadBURK-li-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
natural abundance (corff dynol)
0 %
natural abundance (Awyrfaen)
0 %
natural abundance (Haul)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants