Berkelium (Bk)

element with the atomic number of 97

Atomic Number	97
Atomic Weight	247
mass number	233

Group
Period	7
Block	f

proton	97 p⁺
neutron	136 n⁰
electron	97 e^-

Physical Property

Atomic Radius
molar volume
Covalent Radius	168 pm 139 pm
Metallic Radius
ionic radius	96 pm 83 pm 93 pm 113.7 pm
Crystal Radius	110 pm 97 pm 107 pm 127.7 pm
Van der Waals radius	244 pm 333.9 pm
density	14.78 g/cm³

Chemical Property

{ERROR}

energia

proton affinity
electron affinity
ionization energy	6.1978 eV/particle 11.9 eV/particle 21.6 eV/particle 36 eV/particle 56 eV/particle 70.1 eV/particle 90 eV/particle 114 eV/particle 130 eV/particle 147 eV/particle 171 eV/particle 195 eV/particle 218 eV/particle 240 eV/particle 259 eV/particle 279 eV/particle 303 eV/particle 339 eV/particle 361 eV/particle 497 eV/particle 526 eV/particle 557 eV/particle 590 eV/particle 621 eV/particle 652 eV/particle 700 eV/particle 733 eV/particle 768 eV/particle 800 eV/particle 960 eV/particle 1000 eV/particle 1040 eV/particle 1080 eV/particle 1200 eV/particle 1240 eV/particle 1360 eV/particle 1410 eV/particle 1550 eV/particle 1630 eV/particle 1720 eV/particle 1800 eV/particle 1890 eV/particle 1970 eV/particle 2050 eV/particle 2140 eV/particle 2240 eV/particle 2320 eV/particle 2410 eV/particle 2490 eV/particle 2580 eV/particle 2670 eV/particle 3080 eV/particle 3154 eV/particle 3232 eV/particle 3315 eV/particle 3393 eV/particle 3469 eV/particle 3630 eV/particle 3709 eV/particle 3797 eV/particle 3877 eV/particle 4202 eV/particle 4281 eV/particle 4365 eV/particle 4445 eV/particle 4940 eV/particle 5040 eV/particle 5270 eV/particle 5360 eV/particle 8500 eV/particle 8670 eV/particle 8850 eV/particle 9050 eV/particle 9240 eV/particle 9420 eV/particle 9880 eV/particle 10070 eV/particle 10280 eV/particle 10480 eV/particle 11020 eV/particle 11190 eV/particle 11380 eV/particle 11540 eV/particle 13090 eV/particle 13300 eV/particle 13720 eV/particle 13910 eV/particle 28380 eV/particle 28800 eV/particle 29300 eV/particle 29800 eV/particle 35500 eV/particle 36200 eV/particle 37000 eV/particle 37457.6 eV/particle 146904.7 eV/particle 149398 eV/particle

enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation	310 kJ/mol
electron

Tegimen electronicum	2, 8, 18, 32, 27, 8, 2

valence electron	2 ⓘ

electron configuration	[Rn] 5f⁹ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f⁹ 7s²

oxidation number	2, 3, 4, 5
electronegativity	0.19315
Electrophilicity Index
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point
Melting Point	1259.15 K
critical pressure
critical temperature
Punctum triplex
appearance
Color	Black #ffffff #8a4fe3 #8a4fe3
appearance	silvery
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
Superconductrum
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
celeritas soni
classificare
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	41
Mendeleev Number	30
Pettifor Number	40
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	125 ± 25 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	710
Neutron Mass Absorption
quantum number	6H15/2
space group	194 (P63/mmc)

Isotopes of Berkelium

Stable Isotopes	0
Unstable Isotopes	22
Natural Isotopes	0

²³³Bk

mass number	233
neutron number	136
Relative Atomic Mass	233.056652 ± 0.00025 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	40 ± 30 s
Volubilitas	3/2
nuclear quadrupole moment
repertus	2015
parity	-

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

²³⁴Bk

mass number	234
neutron number	137
Relative Atomic Mass	234.057322 ± 0.000164 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	20 ± 5 s
Volubilitas	3
nuclear quadrupole moment
repertus	2003
parity	-

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

²³⁵Bk

mass number	235
neutron number	138
Relative Atomic Mass	235.056651 ± 0.00043 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	3/2
nuclear quadrupole moment
repertus
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

²³⁶Bk

mass number	236
neutron number	139
Relative Atomic Mass	236.057479 ± 0.000387 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	26 ± 10 s
Volubilitas	4
nuclear quadrupole moment
repertus	2017
parity	+

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

²³⁷Bk

mass number	237
neutron number	140
Relative Atomic Mass	237.057123 ± 0.000247 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	3/2
nuclear quadrupole moment
repertus
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

²³⁸Bk

mass number	238
neutron number	141
Relative Atomic Mass	238.058204 ± 0.000275 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	2.4 ± 0.08 m
Volubilitas	1
nuclear quadrupole moment
repertus	1994
parity

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

²³⁹Bk

mass number	239
neutron number	142
Relative Atomic Mass	239.058239 ± 0.000222 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	7/2
nuclear quadrupole moment
repertus	1989
parity	+

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

²⁴⁰Bk

mass number	240
neutron number	143
Relative Atomic Mass	240.059758 ± 0.000161 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	4.8 ± 0.8 m
Volubilitas	7
nuclear quadrupole moment
repertus	1980
parity	-

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

²⁴¹Bk

mass number	241
neutron number	144
Relative Atomic Mass	241.060098 ± 0.000178 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	4.6 ± 0.4 m
Volubilitas	7/2
nuclear quadrupole moment
repertus	2003
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

²⁴²Bk

mass number	242
neutron number	145
Relative Atomic Mass	242.061999 ± 0.000144 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	7 ± 1.3 m
Volubilitas	3
nuclear quadrupole moment
repertus	1972
parity	+

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

²⁴³Bk

mass number	243
neutron number	146
Relative Atomic Mass	243.063005905 ± 0.000004856 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	4.6 ± 0.2 h
Volubilitas	3/2
nuclear quadrupole moment
repertus	1950
parity	-

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

²⁴⁴Bk

mass number	244
neutron number	147
Relative Atomic Mass	244.065178969 ± 0.000015457 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	5.02 ± 0.03 h
Volubilitas	4
nuclear quadrupole moment
repertus	1972
parity	-

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

²⁴⁵Bk

mass number	245
neutron number	148
Relative Atomic Mass	245.066359814 ± 0.000001923 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	4.95 ± 0.03 d
Volubilitas	3/2
nuclear quadrupole moment
repertus	1951
parity	-

decay mode	intensity
ϵ (electron capture)	99.88%
α (α emission)	0.12%

²⁴⁶Bk

mass number	246
neutron number	149
Relative Atomic Mass	246.0686713 ± 0.000064433 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.8 ± 0.02 d
Volubilitas	2
nuclear quadrupole moment
repertus	1954
parity

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

²⁴⁷Bk

mass number	247
neutron number	150
Relative Atomic Mass	247.070305889 ± 0.00000557 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.38 ± 0.25 ky
Volubilitas	3/2
nuclear quadrupole moment
repertus	1965
parity	-

decay mode	intensity
α (α emission)	100%
SF (spontaneous fission)

²⁴⁸Bk

mass number	248
neutron number	151
Relative Atomic Mass	248.073141689 ± 0.000053739 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	6
nuclear quadrupole moment
repertus	1956
parity	+

decay mode	intensity
α (α emission)
ϵ (electron capture)

²⁴⁹Bk

mass number	249
neutron number	152
Relative Atomic Mass	249.074983118 ± 0.000001339 Da
g-factor	0.57142857142857 ± 0.11428571428571
natural abundance
radioactivitas	☢️ radioactive element
half-life	327.2 ± 0.3 d
Volubilitas	7/2
nuclear quadrupole moment
repertus	1954
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
α (α emission)	0.00145%
SF (spontaneous fission)	47%

²⁵⁰Bk

mass number	250
neutron number	153
Relative Atomic Mass	250.078317195 ± 0.00000311 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	3.212 ± 0.005 h
Volubilitas	2
nuclear quadrupole moment
repertus	1954
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁵¹Bk

mass number	251
neutron number	154
Relative Atomic Mass	251.080760555 ± 0.000011523 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	55.6 ± 1.1 m
Volubilitas	3/2
nuclear quadrupole moment
repertus	1967
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁵²Bk

mass number	252
neutron number	155
Relative Atomic Mass	252.08431 ± 0.000215 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.8 ± 0.5 m
Volubilitas
nuclear quadrupole moment
repertus	1988
parity

decay mode	intensity
β⁻ (β⁻ decay)
α (α emission)

²⁵³Bk

mass number	253
neutron number	156
Relative Atomic Mass	253.08688 ± 0.000385 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	3/2
nuclear quadrupole moment
repertus	1991
parity	-

decay mode	intensity
β⁻ (β⁻ decay)

²⁵⁴Bk

mass number	254
neutron number	157
Relative Atomic Mass	254.0906 ± 0.00032 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas
nuclear quadrupole moment
repertus
parity

decay mode	intensity
β⁻ (β⁻ decay)

historia

inventor	G.T.Seaborg, S.G.Tompson, A.Ghiorso
location of discovery	United States
repertus	1949
Etymologia	Named after Berkeley, California the city of its discovery.
pronunciation	BURK-li-em (English)

source

Abundance
Abundance in Earth's crust
natural abundance (Oceanus)
natural abundance (Corpus humanum)	0 %
natural abundance (Meteoroides)	0 %
natural abundance (Sol)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Berkelium on ChemicalAid

Berkelium (Bk)

Physical Property

Chemical Property

other

Isotopes of Berkelium

233Bk

234Bk

235Bk

236Bk

237Bk

238Bk

239Bk

240Bk

241Bk

242Bk

243Bk

244Bk

245Bk

246Bk

247Bk

248Bk

249Bk

250Bk

251Bk

252Bk

253Bk

254Bk

historia

source

Nuclear Screening Constants

²³³Bk

²³⁴Bk

²³⁵Bk

²³⁶Bk

²³⁷Bk

²³⁸Bk

²³⁹Bk

²⁴⁰Bk

²⁴¹Bk

²⁴²Bk

²⁴³Bk

²⁴⁴Bk

²⁴⁵Bk

²⁴⁶Bk

²⁴⁷Bk

²⁴⁸Bk

²⁴⁹Bk

²⁵⁰Bk

²⁵¹Bk

²⁵²Bk

²⁵³Bk

²⁵⁴Bk