Berquelio (Bk)

element with the atomic number of 97

Atomic Number	97
Atomic Weight	247
Numero masico	233

Group
Period	7
Block	f

Protón	97 p⁺
Neutrón	136 n⁰
Electrón	97 e^-

Animated Modelo atomico de Bohr of Bk (Berquelio)

Physical Property

Radio Atomico
molar volume
Radio covalent	168 pm 139 pm
Metallic Radius
Radio ionico	96 pm 83 pm 93 pm 113.7 pm
Crystal Radius	110 pm 97 pm 107 pm 127.7 pm
Radio de van der Waals	244 pm 333.9 pm
density	14.78 g/cm³

Chemical Property

enerchía

proton affinity
Afinidat electronica
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

Entalpía de vaporización
entalpía de fusión
standard enthalpy of formation	310 kJ/mol
Electrón

electron shell	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

Numero d'oxidación	2, 3, 4, 5
Electronegatividat	0.19315
Electrophilicity Index
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point
Melting Point	1259.15 K
critical pressure
critical temperature
Punto triple
appearance
Color	Colorless #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
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	Simple Hexagonal ()
lattice constant
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
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

Numero masico	233
neutron number	136
Relative Atomic Mass	233.056652 ± 0.00025 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	40 ± 30 s
spin	3/2
nuclear quadrupole moment
time of discovery or invention	2015
parity	-

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

²³⁴Bk

Numero masico	234
neutron number	137
Relative Atomic Mass	234.057322 ± 0.000164 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	20 ± 5 s
spin	3
nuclear quadrupole moment
time of discovery or invention	2003
parity	-

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

²³⁵Bk

Numero masico	235
neutron number	138
Relative Atomic Mass	235.056651 ± 0.00043 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración
spin	3/2
nuclear quadrupole moment
time of discovery or invention
parity	-

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

²³⁶Bk

Numero masico	236
neutron number	139
Relative Atomic Mass	236.057479 ± 0.000387 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	26 ± 10 s
spin	4
nuclear quadrupole moment
time of discovery or invention	2017
parity	+

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

²³⁷Bk

Numero masico	237
neutron number	140
Relative Atomic Mass	237.057123 ± 0.000247 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración
spin	3/2
nuclear quadrupole moment
time of discovery or invention
parity	-

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

²³⁸Bk

Numero masico	238
neutron number	141
Relative Atomic Mass	238.058204 ± 0.000275 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	2.4 ± 0.08 m
spin	1
nuclear quadrupole moment
time of discovery or invention	1994
parity

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

²³⁹Bk

Numero masico	239
neutron number	142
Relative Atomic Mass	239.058239 ± 0.000222 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración
spin	7/2
nuclear quadrupole moment
time of discovery or invention	1989
parity	+

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

²⁴⁰Bk

Numero masico	240
neutron number	143
Relative Atomic Mass	240.059758 ± 0.000161 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	4.8 ± 0.8 m
spin	7
nuclear quadrupole moment
time of discovery or invention	1980
parity	-

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

²⁴¹Bk

Numero masico	241
neutron number	144
Relative Atomic Mass	241.060098 ± 0.000178 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	4.6 ± 0.4 m
spin	7/2
nuclear quadrupole moment
time of discovery or invention	2003
parity	+

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

²⁴²Bk

Numero masico	242
neutron number	145
Relative Atomic Mass	242.061999 ± 0.000144 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	7 ± 1.3 m
spin	3
nuclear quadrupole moment
time of discovery or invention	1972
parity	+

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

²⁴³Bk

Numero masico	243
neutron number	146
Relative Atomic Mass	243.063005905 ± 0.000004856 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	4.6 ± 0.2 h
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1950
parity	-

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

²⁴⁴Bk

Numero masico	244
neutron number	147
Relative Atomic Mass	244.065178969 ± 0.000015457 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	5.02 ± 0.03 h
spin	4
nuclear quadrupole moment
time of discovery or invention	1972
parity	-

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

²⁴⁵Bk

Numero masico	245
neutron number	148
Relative Atomic Mass	245.066359814 ± 0.000001923 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	4.95 ± 0.03 d
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1951
parity	-

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

²⁴⁶Bk

Numero masico	246
neutron number	149
Relative Atomic Mass	246.0686713 ± 0.000064433 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	1.8 ± 0.02 d
spin	2
nuclear quadrupole moment
time of discovery or invention	1954
parity

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

²⁴⁷Bk

Numero masico	247
neutron number	150
Relative Atomic Mass	247.070305889 ± 0.00000557 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	1.38 ± 0.25 ky
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1965
parity	-

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

²⁴⁸Bk

Numero masico	248
neutron number	151
Relative Atomic Mass	248.073141689 ± 0.000053739 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración
spin	6
nuclear quadrupole moment
time of discovery or invention	1956
parity	+

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

²⁴⁹Bk

Numero masico	249
neutron number	152
Relative Atomic Mass	249.074983118 ± 0.000001339 Da
g-factor	0.57142857142857 ± 0.11428571428571
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	327.2 ± 0.3 d
spin	7/2
nuclear quadrupole moment
time of discovery or invention	1954
parity	+

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

²⁵⁰Bk

Numero masico	250
neutron number	153
Relative Atomic Mass	250.078317195 ± 0.00000311 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	3.212 ± 0.005 h
spin	2
nuclear quadrupole moment
time of discovery or invention	1954
parity	-

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

²⁵¹Bk

Numero masico	251
neutron number	154
Relative Atomic Mass	251.080760555 ± 0.000011523 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	55.6 ± 1.1 m
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1967
parity	-

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

²⁵²Bk

Numero masico	252
neutron number	155
Relative Atomic Mass	252.08431 ± 0.000215 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración	1.8 ± 0.5 m
spin
nuclear quadrupole moment
time of discovery or invention	1988
parity

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

²⁵³Bk

Numero masico	253
neutron number	156
Relative Atomic Mass	253.08688 ± 0.000385 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1991
parity	-

decay mode	intensity
β⁻ (β⁻ decay)

²⁵⁴Bk

Numero masico	254
neutron number	157
Relative Atomic Mass	254.0906 ± 0.00032 Da
g-factor
natural abundance
Radioactividat	☢️ radioactive element
Periodo de semidesintegración
spin
nuclear quadrupole moment
time of discovery or invention
parity

decay mode	intensity
β⁻ (β⁻ decay)

historia

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

source

Abundance
Abundance in Earth's crust
natural abundance (ocián)
natural abundance (human body)	0 %
natural abundance (meteoroid)	0 %
natural abundance (Sol)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Berquelio on ChemicalAid

berkelium

Australian Educational Vocabulary ID	scot/2377
CAS Registry Number	7440-40-6
ChEBI ID	33391
ChemSpider ID	22409
DSSTOX compound identifier	DTXCID20147880
DSSTox substance ID	DTXSID70225389
Den Store Danske ID	berkelium
DrugBank ID	12993
Elhuyar ZTH ID	021522
Encyclopædia Britannica Online ID	science/berkelium
Encyclopædia Universalis ID	berkelium
Freebase ID	/m/025svnm
French Vikidia ID	Berkélium
GND ID	4511718-4
Gran Enciclopèdia Catalana ID	0223127
Great Russian Encyclopedia Online ID	1860452
InChI	InChI=1S/Bk
InChIKey	PWVKJRSRVJTHTR-UHFFFAOYSA-N
KBpedia ID	Berkelium
Library of Congress authority ID	sh2012004283
MeSH descriptor ID	D001603
NE.se ID	berkelium
National Library of Israel J9U ID	987007597623305171
OmegaWiki Defined Meaning	156441
Probes And Drugs ID	PD058313
PubChem CID	23971
Römpp online ID	RD-02-00987
Store norske leksikon ID	berkelium
Treccani ID	berkelio
UNII	2YQA718KUU
USGS Thesaurus ID	1405
WordNet 3.1 Synset ID	14655312-n

Berquelio (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