Berkelium (Bk)

element with the atomic number of 97

Atomic Number	97
Atomic Weight	247
Massagetal	233

Group
Period	7
Block	f

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

Physical Property

Atoomradius
molar volume
Covalent Radius	168 pm 139 pm
Metallic Radius
Ioonradius	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}

energie

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 1 000 eV/particle 1 040 eV/particle 1 080 eV/particle 1 200 eV/particle 1 240 eV/particle 1 360 eV/particle 1 410 eV/particle 1 550 eV/particle 1 630 eV/particle 1 720 eV/particle 1 800 eV/particle 1 890 eV/particle 1 970 eV/particle 2 050 eV/particle 2 140 eV/particle 2 240 eV/particle 2 320 eV/particle 2 410 eV/particle 2 490 eV/particle 2 580 eV/particle 2 670 eV/particle 3 080 eV/particle 3 154 eV/particle 3 232 eV/particle 3 315 eV/particle 3 393 eV/particle 3 469 eV/particle 3 630 eV/particle 3 709 eV/particle 3 797 eV/particle 3 877 eV/particle 4 202 eV/particle 4 281 eV/particle 4 365 eV/particle 4 445 eV/particle 4 940 eV/particle 5 040 eV/particle 5 270 eV/particle 5 360 eV/particle 8 500 eV/particle 8 670 eV/particle 8 850 eV/particle 9 050 eV/particle 9 240 eV/particle 9 420 eV/particle 9 880 eV/particle 10 070 eV/particle 10 280 eV/particle 10 480 eV/particle 11 020 eV/particle 11 190 eV/particle 11 380 eV/particle 11 540 eV/particle 13 090 eV/particle 13 300 eV/particle 13 720 eV/particle 13 910 eV/particle 28 380 eV/particle 28 800 eV/particle 29 300 eV/particle 29 800 eV/particle 35 500 eV/particle 36 200 eV/particle 37 000 eV/particle 37 457,6 eV/particle 146 904,7 eV/particle 149 398 eV/particle

Verdampingswarmte
smeltingswarmte
Vormingsentalpie	310 kJ/mol
elektron

Elektronskil	2, 8, 18, 32, 27, 8, 2

Valenselektrone	2 ⓘ

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

Oksidasietoestand	2, 3, 4, 5
Elektronegatiwiteit	0.19315
Electrophilicity Index
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point
Melting Point	1 259,15 K
critical pressure
critical temperature
triple point
appearance
kleur	Black #ffffff #8a4fe3 #8a4fe3
appearance	silvery
Brekingsindeks
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Geleidingsvermoë
Elektriese resistiwiteit
superconductivity
Magnetisme
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
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
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
Ruimtegroep	194 (P63/mmc)

Isotopes of Berkelium

Stable Isotopes	0
Unstable Isotopes	22
Natural Isotopes	0

²³³Bk

Massagetal	233
neutron number	136
Relative Atomic Mass	233,056652 ± 0,00025 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	40 ± 30 s
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	2015
parity	-

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

²³⁴Bk

Massagetal	234
neutron number	137
Relative Atomic Mass	234,057322 ± 0,000164 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	20 ± 5 s
spin	3
nuclear quadrupole moment
ontdekkingsdatum	2003
parity	-

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

²³⁵Bk

Massagetal	235
neutron number	138
Relative Atomic Mass	235,056651 ± 0,00043 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum
parity	-

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

²³⁶Bk

Massagetal	236
neutron number	139
Relative Atomic Mass	236,057479 ± 0,000387 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	26 ± 10 s
spin	4
nuclear quadrupole moment
ontdekkingsdatum	2017
parity	+

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

²³⁷Bk

Massagetal	237
neutron number	140
Relative Atomic Mass	237,057123 ± 0,000247 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum
parity	-

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

²³⁸Bk

Massagetal	238
neutron number	141
Relative Atomic Mass	238,058204 ± 0,000275 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2,4 ± 0,08 m
spin	1
nuclear quadrupole moment
ontdekkingsdatum	1994
parity

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

²³⁹Bk

Massagetal	239
neutron number	142
Relative Atomic Mass	239,058239 ± 0,000222 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	7/2
nuclear quadrupole moment
ontdekkingsdatum	1989
parity	+

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

²⁴⁰Bk

Massagetal	240
neutron number	143
Relative Atomic Mass	240,059758 ± 0,000161 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,8 ± 0,8 m
spin	7
nuclear quadrupole moment
ontdekkingsdatum	1980
parity	-

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

²⁴¹Bk

Massagetal	241
neutron number	144
Relative Atomic Mass	241,060098 ± 0,000178 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,6 ± 0,4 m
spin	7/2
nuclear quadrupole moment
ontdekkingsdatum	2003
parity	+

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

²⁴²Bk

Massagetal	242
neutron number	145
Relative Atomic Mass	242,061999 ± 0,000144 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	7 ± 1,3 m
spin	3
nuclear quadrupole moment
ontdekkingsdatum	1972
parity	+

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

²⁴³Bk

Massagetal	243
neutron number	146
Relative Atomic Mass	243,063005905 ± 0,000004856 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,6 ± 0,2 h
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1950
parity	-

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

²⁴⁴Bk

Massagetal	244
neutron number	147
Relative Atomic Mass	244,065178969 ± 0,000015457 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	5,02 ± 0,03 h
spin	4
nuclear quadrupole moment
ontdekkingsdatum	1972
parity	-

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

²⁴⁵Bk

Massagetal	245
neutron number	148
Relative Atomic Mass	245,066359814 ± 0,000001923 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,95 ± 0,03 d
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1951
parity	-

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

²⁴⁶Bk

Massagetal	246
neutron number	149
Relative Atomic Mass	246,0686713 ± 0,000064433 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,8 ± 0,02 d
spin	2
nuclear quadrupole moment
ontdekkingsdatum	1954
parity

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

²⁴⁷Bk

Massagetal	247
neutron number	150
Relative Atomic Mass	247,070305889 ± 0,00000557 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,38 ± 0,25 ky
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1965
parity	-

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

²⁴⁸Bk

Massagetal	248
neutron number	151
Relative Atomic Mass	248,073141689 ± 0,000053739 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	6
nuclear quadrupole moment
ontdekkingsdatum	1956
parity	+

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

²⁴⁹Bk

Massagetal	249
neutron number	152
Relative Atomic Mass	249,074983118 ± 0,000001339 Da
g-factor	0,57142857142857 ± 0,11428571428571
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	327,2 ± 0,3 d
spin	7/2
nuclear quadrupole moment
ontdekkingsdatum	1954
parity	+

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

²⁵⁰Bk

Massagetal	250
neutron number	153
Relative Atomic Mass	250,078317195 ± 0,00000311 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,212 ± 0,005 h
spin	2
nuclear quadrupole moment
ontdekkingsdatum	1954
parity	-

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

²⁵¹Bk

Massagetal	251
neutron number	154
Relative Atomic Mass	251,080760555 ± 0,000011523 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	55,6 ± 1,1 m
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1967
parity	-

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

²⁵²Bk

Massagetal	252
neutron number	155
Relative Atomic Mass	252,08431 ± 0,000215 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,8 ± 0,5 m
spin
nuclear quadrupole moment
ontdekkingsdatum	1988
parity

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

²⁵³Bk

Massagetal	253
neutron number	156
Relative Atomic Mass	253,08688 ± 0,000385 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1991
parity	-

decay mode	intensity
β⁻ (β⁻ decay)

²⁵⁴Bk

Massagetal	254
neutron number	157
Relative Atomic Mass	254,0906 ± 0,00032 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin
nuclear quadrupole moment
ontdekkingsdatum
parity

decay mode	intensity
β⁻ (β⁻ decay)

geskiedenis

Ontdek deur	G.T.Seaborg, S.G.Tompson, A.Ghiorso
ligging van ontdekking	United States
ontdekkingsdatum	1949
etimologie	Named after Berkeley, California the city of its discovery.
uitspraak	BURK-li-em (Engels)

source

Abundance
Abundance in Earth's crust
natural abundance (oseaan)
natural abundance (human body)	0 %
natural abundance (Meteoroïde)	0 %
natural abundance (Son)	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

geskiedenis

source

Nuclear Screening Constants

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