Kalifornium (Cf)

chemical element with the atomic number of 98

Atomic Number	98
Atomic Weight	251
Nombor jisim	237

Group
Period	7
Block	f

proton	98 p⁺
neutron	139 n⁰
Elektron	98 e^-

Sifat Fizikal

Jejari Atom
molar volume
Jejari kovalen	168 pm 140 pm
Metallic Radius
ionic radius	95 pm 82.1 pm 92 pm 112.6 pm
Crystal Radius	109 pm 96.1 pm 106 pm 126.6 pm
Jejari van der Waals	245 pm 331.3 pm
ketumpatan	15.1 g/cm³

Sifat Kimia

{ERROR}

tenaga

proton affinity
Pertalian elektron
ionization energy	6.2817 eV/particle 12 eV/particle 22.4 eV/particle 37.7 eV/particle 51.9 eV/particle 75 eV/particle 91 eV/particle 112.9 eV/particle 133 eV/particle 152 eV/particle 178 eV/particle 202 eV/particle 225 eV/particle 247 eV/particle 265 eV/particle 286 eV/particle 310 eV/particle 334 eV/particle 368 eV/particle 390 eV/particle 536 eV/particle 566 eV/particle 597 eV/particle 630 eV/particle 662 eV/particle 695 eV/particle 744 eV/particle 778 eV/particle 814 eV/particle 847 eV/particle 1,010 eV/particle 1,050 eV/particle 1,090 eV/particle 1,120 eV/particle 1,250 eV/particle 1,300 eV/particle 1,420 eV/particle 1,460 eV/particle 1,620 eV/particle 1,700 eV/particle 1,790 eV/particle 1,880 eV/particle 1,960 eV/particle 2,050 eV/particle 2,130 eV/particle 2,220 eV/particle 2,320 eV/particle 2,410 eV/particle 2,490 eV/particle 2,580 eV/particle 2,670 eV/particle 2,750 eV/particle 3,186 eV/particle 3,261 eV/particle 3,340 eV/particle 3,424 eV/particle 3,503 eV/particle 3,581 eV/particle 3,747 eV/particle 3,828 eV/particle 3,915 eV/particle 3,998 eV/particle 4,329 eV/particle 4,407 eV/particle 4,494 eV/particle 4,570 eV/particle 5,100 eV/particle 5,190 eV/particle 5,430 eV/particle 5,520 eV/particle 8,730 eV/particle 8,900 eV/particle 9,090 eV/particle 9,290 eV/particle 9,480 eV/particle 9,660 eV/particle 10,140 eV/particle 10,330 eV/particle 10,550 eV/particle 10,740 eV/particle 11,300 eV/particle 11,470 eV/particle 11,650 eV/particle 11,820 eV/particle 13,450 eV/particle 13,660 eV/particle 14,080 eV/particle 14,280 eV/particle 29,000 eV/particle 29,500 eV/particle 30,000 eV/particle 30,500 eV/particle 36,500 eV/particle 37,100 eV/particle 37,900 eV/particle 38,443.5 eV/particle 150,579.3 eV/particle 153,124 eV/particle

Entalpi pengewapan
entalpi pelakuran
standard enthalpy of formation	196 kJ/mol
Elektron

Petala elektron	2, 8, 18, 32, 28, 8, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Rn] 5f¹⁰ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹⁰ 7s²

Keadaan pengoksidaan	2, 3, 4, 5
Keelektronegatifan	0.20369
Electrophilicity Index
keadaan jirim asas

fasa jirim
gaseous state of matter
Boiling Point
Melting Point	1,173.15 K
critical pressure
critical temperature
triple point
rupa
warna	Black #ffffff #a136d4 #a136d4
rupa	silvery
indeks biasan
sifat bahan
Thermal Conductivity
Pengembangan terma
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Kekonduksian elektrik
Kerintangan dan kekonduksian elektrik
Kesuperkonduksian
kemagnetan
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	{ERROR}
lattice constant
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi
pengelasan
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	42
Mendeleev Number	32
Pettifor Number	39
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	122 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	2,900
Neutron Mass Absorption
Nombor kuantum	5I8
space group	194 (P63/mmc)

Isotopes of Californium

Stable Isotopes	0
Unstable Isotopes	20
Natural Isotopes	0

²³⁷Cf

Nombor jisim	237
nombor neutron	139
Jisim Atom Relatif	237.062199272 ± 0.000104506 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	0.8 ± 0.2 s
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1995
parity	+

decay mode	Keamatan (fizik)
α (α emission)	70%
SF (spontaneous fission)	30%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²³⁸Cf

Nombor jisim	238
nombor neutron	140
Jisim Atom Relatif	238.06149 ± 0.00032 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	21.1 ± 1.3 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1995
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	97.5%
α (α emission)	2.5%

²³⁹Cf

Nombor jisim	239
nombor neutron	141
Jisim Atom Relatif	239.062482 ± 0.000129 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	28 ± 2 s
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1981
parity	+

decay mode	Keamatan (fizik)
α (α emission)	65%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴⁰Cf

Nombor jisim	240
nombor neutron	142
Jisim Atom Relatif	240.062253447 ± 0.00001936 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	40.3 ± 0.9 s
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1970
parity	+

decay mode	Keamatan (fizik)
α (α emission)	98.5%
SF (spontaneous fission)	1.5%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴¹Cf

Nombor jisim	241
nombor neutron	143
Jisim Atom Relatif	241.06369 ± 0.00018 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.35 ± 0.18 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)	15%

²⁴²Cf

Nombor jisim	242
nombor neutron	144
Jisim Atom Relatif	242.063754544 ± 0.00001384 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.49 ± 0.15 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1967
parity	+

decay mode	Keamatan (fizik)
α (α emission)	61%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	39%
SF (spontaneous fission)	0.014%

²⁴³Cf

Nombor jisim	243
nombor neutron	145
Jisim Atom Relatif	243.065475 ± 0.000194 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	10.8 ± 0.3 m
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1967
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	86%
α (α emission)	14%

²⁴⁴Cf

Nombor jisim	244
nombor neutron	146
Jisim Atom Relatif	244.065999447 ± 0.000002809 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	19.5 ± 0.5 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1956
parity	+

decay mode	Keamatan (fizik)
α (α emission)	75%
ϵ (electron capture)	25%

²⁴⁵Cf

Nombor jisim	245
nombor neutron	147
Jisim Atom Relatif	245.068046755 ± 0.000002606 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	45 ± 1.5 m
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1956
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	64.7%
α (α emission)	35.3%

²⁴⁶Cf

Nombor jisim	246
nombor neutron	148
Jisim Atom Relatif	246.068803685 ± 0.000001625 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	35.7 ± 0.5 h
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1951
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	2.4%
ϵ (electron capture)

²⁴⁷Cf

Nombor jisim	247
nombor neutron	149
Jisim Atom Relatif	247.070971348 ± 0.00001538 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.11 ± 0.03 h
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
ϵ (electron capture)	99.965%
α (α emission)	0.035%

²⁴⁸Cf

Nombor jisim	248
nombor neutron	150
Jisim Atom Relatif	248.072182905 ± 0.000005497 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	333.5 ± 2.8 d
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	0.0029%

²⁴⁹Cf

Nombor jisim	249
nombor neutron	151
Jisim Atom Relatif	249.074850428 ± 0.000001269 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	351 ± 2 y
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1954
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	5%

²⁵⁰Cf

Nombor jisim	250
nombor neutron	152
Jisim Atom Relatif	250.076404494 ± 0.00000165 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	13.08 ± 0.09 y
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	99.923%
SF (spontaneous fission)	0.077%

²⁵¹Cf

Nombor jisim	251
nombor neutron	153
Jisim Atom Relatif	251.079587171 ± 0.000004187 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	898 ± 44 y
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)

²⁵²Cf

Nombor jisim	252
nombor neutron	154
Jisim Atom Relatif	252.081626507 ± 0.000002531 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.645 ± 0.008 y
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	96.8972%
SF (spontaneous fission)	3.1028%

²⁵³Cf

Nombor jisim	253
nombor neutron	155
Jisim Atom Relatif	253.085133723 ± 0.00000457 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	17.81 ± 0.08 d
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	99.69%
α (α emission)	0.31%

²⁵⁴Cf

Nombor jisim	254
nombor neutron	156
Jisim Atom Relatif	254.087323575 ± 0.000012304 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	60.5 ± 0.2 d
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1955
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	99.69%
α (α emission)	0.31%
2β⁻ (double β⁻ decay)

²⁵⁵Cf

Nombor jisim	255
nombor neutron	157
Jisim Atom Relatif	255.091046 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	85 ± 18 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1981
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
SF (spontaneous fission)
α (α emission)

²⁵⁶Cf

Nombor jisim	256
nombor neutron	158
Jisim Atom Relatif	256.093442 ± 0.000338 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	12.3 ± 1.2 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1980
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	100%
α (α emission)
2β⁻ (double β⁻ decay)

sejarah

penemu atau pereka	G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
tempat penemuan	United States
tarikh penemuan	1950
Etimologi	Named after the state and University of California.
sebutan	kal-eh-FOR-ni-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust
natural abundance (lautan)
natural abundance (Tubuh manusia)	0 %
natural abundance (Meteoroid)	0 %
natural abundance (Matahari)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Kalifornium on ChemicalAid

Kalifornium (Cf)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Californium

237Cf

238Cf

239Cf

240Cf

241Cf

242Cf

243Cf

244Cf

245Cf

246Cf

247Cf

248Cf

249Cf

250Cf

251Cf

252Cf

253Cf

254Cf

255Cf

256Cf

sejarah

sumber

Nuclear Screening Constants

²³⁷Cf

²³⁸Cf

²³⁹Cf

²⁴⁰Cf

²⁴¹Cf

²⁴²Cf

²⁴³Cf

²⁴⁴Cf

²⁴⁵Cf

²⁴⁶Cf

²⁴⁷Cf

²⁴⁸Cf

²⁴⁹Cf

²⁵⁰Cf

²⁵¹Cf

²⁵²Cf

²⁵³Cf

²⁵⁴Cf

²⁵⁵Cf

²⁵⁶Cf