Berkeli

Berkeli (Bk)

element with the atomic number of 97
Atomic Number97
Atomic Weight247
mass number233
Group
Period7
Blockf
protoni97 p+
nyutroni136 n0
elektroni97 e-
Animated Bohr model of Bk (Berkeli)

Physical Property

Atomic Radius
molar volume
Covalent Radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
msongamano

Chemical Property

nishati
proton affinity
electron affinity
ionization energy
ionization energy of Bk (Berkeli)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
elektroni
Mzingo elektroni2, 8, 18, 32, 27, 8, 2
Bohr model: Bk (Berkeli)
valence electron2
Lewis structure: Bk (Berkeli)
electron configuration[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)
oxidation number2, 3, 4, 5
electronegativity
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
Kiwango utatu
appearance
Rangi
Colorless
appearancesilvery
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
Uga sumaku
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal StructureSimple Hexagonal ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
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
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

mass number233
neutron number136
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
40 ± 30 s
spin3/2
nuclear quadrupole moment
Uvumbuzi2015
parity-

hali ya kuozaintensity
α (α emission)82%
β+ (β+ decay; β+ = ϵ + e+)

234Bk

mass number234
neutron number137
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
20 ± 5 s
spin3
nuclear quadrupole moment
Uvumbuzi2003
parity-

hali ya kuozaintensity
α (α emission)80%
β+ (β+ decay; β+ = ϵ + e+)20%

235Bk

mass number235
neutron number138
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin3/2
nuclear quadrupole moment
Uvumbuzi
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

236Bk

mass number236
neutron number139
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
26 ± 10 s
spin4
nuclear quadrupole moment
Uvumbuzi2017
parity+

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

237Bk

mass number237
neutron number140
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin3/2
nuclear quadrupole moment
Uvumbuzi
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

238Bk

mass number238
neutron number141
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.4 ± 0.08 m
spin1
nuclear quadrupole moment
Uvumbuzi1994
parity

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

239Bk

mass number239
neutron number142
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin7/2
nuclear quadrupole moment
Uvumbuzi1989
parity+

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

240Bk

mass number240
neutron number143
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.8 ± 0.8 m
spin7
nuclear quadrupole moment
Uvumbuzi1980
parity-

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

241Bk

mass number241
neutron number144
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.6 ± 0.4 m
spin7/2
nuclear quadrupole moment
Uvumbuzi2003
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

242Bk

mass number242
neutron number145
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
7 ± 1.3 m
spin3
nuclear quadrupole moment
Uvumbuzi1972
parity+

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

243Bk

mass number243
neutron number146
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.6 ± 0.2 h
spin3/2
nuclear quadrupole moment
Uvumbuzi1950
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.15%

244Bk

mass number244
neutron number147
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
5.02 ± 0.03 h
spin4
nuclear quadrupole moment
Uvumbuzi1972
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)0.006%

245Bk

mass number245
neutron number148
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.95 ± 0.03 d
spin3/2
nuclear quadrupole moment
Uvumbuzi1951
parity-

hali ya kuozaintensity
ϵ (electron capture)99.88%
α (α emission)0.12%

246Bk

mass number246
neutron number149
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1.8 ± 0.02 d
spin2
nuclear quadrupole moment
Uvumbuzi1954
parity

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)

247Bk

mass number247
neutron number150
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1.38 ± 0.25 ky
spin3/2
nuclear quadrupole moment
Uvumbuzi1965
parity-

hali ya kuozaintensity
α (α emission)100%
SF (spontaneous fission)

248Bk

mass number248
neutron number151
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin6
nuclear quadrupole moment
Uvumbuzi1956
parity+

hali ya kuozaintensity
α (α emission)
ϵ (electron capture)

249Bk

mass number249
neutron number152
Relative Atomic Mass
g-factor
0.57142857142857 ± 0.11428571428571
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
327.2 ± 0.3 d
spin7/2
nuclear quadrupole moment
Uvumbuzi1954
parity+

hali ya kuozaintensity
β (β decay)100%
α (α emission)0.00145%
SF (spontaneous fission)47%

250Bk

mass number250
neutron number153
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
3.212 ± 0.005 h
spin2
nuclear quadrupole moment
Uvumbuzi1954
parity-

hali ya kuozaintensity
β (β decay)100%

251Bk

mass number251
neutron number154
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
55.6 ± 1.1 m
spin3/2
nuclear quadrupole moment
Uvumbuzi1967
parity-

hali ya kuozaintensity
β (β decay)100%

252Bk

mass number252
neutron number155
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1.8 ± 0.5 m
spin
nuclear quadrupole moment
Uvumbuzi1988
parity

hali ya kuozaintensity
β (β decay)
α (α emission)

253Bk

mass number253
neutron number156
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin3/2
nuclear quadrupole moment
Uvumbuzi1991
parity-

hali ya kuozaintensity
β (β decay)

254Bk

mass number254
neutron number157
Relative Atomic Mass
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin
nuclear quadrupole moment
Uvumbuzi
parity

hali ya kuozaintensity
β (β decay)
Berkelium metal

historia

mgunduzi au mvumbuziG.T.Seaborg, S.G.Tompson, A.Ghiorso
location of discoveryUnited States
Uvumbuzi1949
EtimolojiaNamed after Berkeley, California the city of its discovery.
pronunciationBURK-li-em (Kiingereza)

source

Abundance
Abundance in Earth's crust
natural abundance (Bahari)
natural abundance (Mwili)
0 %
natural abundance (Kimondo)
0 %
natural abundance (Jua)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants