Berkelium (Bk)

element with the atomic number of 97

Atomic Number	97
Atomic Weight	247
Numri i masës	233

Group
Period	7
Block	f

protoni	97 p⁺
neutroni	136 n⁰
elektroni	97 e^-

Tipar Fizik

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}

energjia

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

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

electron shell	2, 8, 18, 32, 27, 8, 2

valence electron	2 ⓘ

konfigurimi i elektronit	[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
Elektronegativiteti	0.19315
Electrophilicity Index
fundamental state of matter

gjendja agregate e materies
gaseous state of matter
Boiling Point
Melting Point	1 259,15 K
critical pressure
critical temperature
triple point
appearance
Ngjyra	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
Superpërcjellshmëria
Magnetizimi
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strukturë
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
Shpejtësia e zërit
klasifikim
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
numër kuantik	6H15/2
space group	194 (P63/mmc)

Isotopes of Berkelium

Stable Isotopes	0
Unstable Isotopes	22
Natural Isotopes	0

²³³Bk

Numri i masës	233
numri i neutroneve	136
Relative Atomic Mass	233,056652 ± 0,00025 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	40 ± 30 s
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2015
parity	-

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

²³⁴Bk

Numri i masës	234
numri i neutroneve	137
Relative Atomic Mass	234,057322 ± 0,000164 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	20 ± 5 s
Spini	3
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2003
parity	-

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

²³⁵Bk

Numri i masës	235
numri i neutroneve	138
Relative Atomic Mass	235,056651 ± 0,00043 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity	-

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

²³⁶Bk

Numri i masës	236
numri i neutroneve	139
Relative Atomic Mass	236,057479 ± 0,000387 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	26 ± 10 s
Spini	4
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2017
parity	+

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

²³⁷Bk

Numri i masës	237
numri i neutroneve	140
Relative Atomic Mass	237,057123 ± 0,000247 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity	-

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

²³⁸Bk

Numri i masës	238
numri i neutroneve	141
Relative Atomic Mass	238,058204 ± 0,000275 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	2,4 ± 0,08 m
Spini	1
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1994
parity

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

²³⁹Bk

Numri i masës	239
numri i neutroneve	142
Relative Atomic Mass	239,058239 ± 0,000222 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1989
parity	+

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

²⁴⁰Bk

Numri i masës	240
numri i neutroneve	143
Relative Atomic Mass	240,059758 ± 0,000161 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	4,8 ± 0,8 m
Spini	7
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1980
parity	-

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

²⁴¹Bk

Numri i masës	241
numri i neutroneve	144
Relative Atomic Mass	241,060098 ± 0,000178 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	4,6 ± 0,4 m
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2003
parity	+

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

²⁴²Bk

Numri i masës	242
numri i neutroneve	145
Relative Atomic Mass	242,061999 ± 0,000144 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	7 ± 1,3 m
Spini	3
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1972
parity	+

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

²⁴³Bk

Numri i masës	243
numri i neutroneve	146
Relative Atomic Mass	243,063005905 ± 0,000004856 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	4,6 ± 0,2 h
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1950
parity	-

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

²⁴⁴Bk

Numri i masës	244
numri i neutroneve	147
Relative Atomic Mass	244,065178969 ± 0,000015457 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	5,02 ± 0,03 h
Spini	4
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1972
parity	-

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

²⁴⁵Bk

Numri i masës	245
numri i neutroneve	148
Relative Atomic Mass	245,066359814 ± 0,000001923 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	4,95 ± 0,03 d
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1951
parity	-

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

²⁴⁶Bk

Numri i masës	246
numri i neutroneve	149
Relative Atomic Mass	246,0686713 ± 0,000064433 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,8 ± 0,02 d
Spini	2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1954
parity

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

²⁴⁷Bk

Numri i masës	247
numri i neutroneve	150
Relative Atomic Mass	247,070305889 ± 0,00000557 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,38 ± 0,25 ky
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1965
parity	-

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

²⁴⁸Bk

Numri i masës	248
numri i neutroneve	151
Relative Atomic Mass	248,073141689 ± 0,000053739 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	6
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1956
parity	+

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

²⁴⁹Bk

Numri i masës	249
numri i neutroneve	152
Relative Atomic Mass	249,074983118 ± 0,000001339 Da
g-factor	0,57142857142857 ± 0,11428571428571
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	327,2 ± 0,3 d
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1954
parity	+

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

²⁵⁰Bk

Numri i masës	250
numri i neutroneve	153
Relative Atomic Mass	250,078317195 ± 0,00000311 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	3,212 ± 0,005 h
Spini	2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1954
parity	-

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

²⁵¹Bk

Numri i masës	251
numri i neutroneve	154
Relative Atomic Mass	251,080760555 ± 0,000011523 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	55,6 ± 1,1 m
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1967
parity	-

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

²⁵²Bk

Numri i masës	252
numri i neutroneve	155
Relative Atomic Mass	252,08431 ± 0,000215 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,8 ± 0,5 m
Spini
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1988
parity

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

²⁵³Bk

Numri i masës	253
numri i neutroneve	156
Relative Atomic Mass	253,08688 ± 0,000385 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1991
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)

²⁵⁴Bk

Numri i masës	254
numri i neutroneve	157
Relative Atomic Mass	254,0906 ± 0,00032 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity

decay mode	intensitet
β⁻ (β⁻ decay)

historia

zbulues	G.T.Seaborg, S.G.Tompson, A.Ghiorso
vendndodhja e zbulimit	United States
koha e zbulimit apo shpikjes	1949
Etimologjia	Named after Berkeley, California the city of its discovery.
pronunciation	BURK-li-em (anglisht)

burim

Abundance
Abundance in Earth's crust
natural abundance (Oqeani)
natural abundance (Trupi i njeriut)	0 %
natural abundance (meteoroid)	0 %
natural abundance (Diell)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Berkelium on ChemicalAid

Berkelium (Bk)

Tipar Fizik

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

burim

Nuclear Screening Constants

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²³⁸Bk

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²⁴⁰Bk

²⁴¹Bk

²⁴²Bk

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²⁴⁴Bk

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²⁴⁷Bk

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