Californij[um] (Cf)

hemijski element sa simbolom Cf i atomskim brojem 98

Atomic Number	98
Atomic Weight	251
Maseni broj	237

Group
Period	7
Block	f

Proton	98 p⁺
Neutron	139 n⁰
Elektron	98 e^-

Animated Bohrov model atoma of Cf (Californij[um])

Physical Property

Atomski Radijus
Molarni volumen
covalent radius	168 pm 140 pm
Metallic Radius
Ionski radijus	95 pm 82,1 pm 92 pm 112,6 pm
Crystal Radius	109 pm 96,1 pm 106 pm 126,6 pm
Van der Waalsov radijus	245 pm 331,3 pm
gustoća	15,1 g/cm³

Chemical Property

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energija

proton affinity
electron affinity
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

Toplota isparavanja
toplota topljenja
standard enthalpy of formation	196 kJ/mol
Elektron

electron shell	2, 8, 18, 32, 28, 8, 2

Valentni elektron	2 ⓘ

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

oksidacijsko stanje	2, 3, 4, 5
Elektronegativnost	0.20369
Electrophilicity Index
fundamental state of matter

agregatno stanje
gaseous state of matter
Boiling Point
Melting Point	1.173,15 K
critical pressure
Kritična temperatura
Trojna tačka
appearance
boja	Black #ffffff #a136d4 #a136d4
appearance	silvery
Indeks prelamanja
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Specifična električna provodljivost
electrical resistivity
Superprovodljivost
Magnetizam
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal Structure	{ERROR}
lattice constant
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
Tvrdoća
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Brzina zvuka
klasifikacija
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
Kvantni brojevi	5I8
space group	194 (P63/mmc)

Isotopes of Californium

Stable Isotopes	0
Unstable Isotopes	20
Natural Isotopes	0

²³⁷Cf

Maseni broj	237
broj neutrona	139
Relative Atomic Mass	237,062199272 ± 0,000104506 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	0,8 ± 0,2 s
spin	5/2
nuclear quadrupole moment
datum otkrića	1995
parity	+

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

²³⁸Cf

Maseni broj	238
broj neutrona	140
Relative Atomic Mass	238,06149 ± 0,00032 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	21,1 ± 1,3 ms
spin	0
nuclear quadrupole moment	0
datum otkrića	1995
parity	+

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

²³⁹Cf

Maseni broj	239
broj neutrona	141
Relative Atomic Mass	239,062482 ± 0,000129 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	28 ± 2 s
spin	5/2
nuclear quadrupole moment
datum otkrića	1981
parity	+

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

²⁴⁰Cf

Maseni broj	240
broj neutrona	142
Relative Atomic Mass	240,062253447 ± 0,00001936 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	40,3 ± 0,9 s
spin	0
nuclear quadrupole moment	0
datum otkrića	1970
parity	+

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

²⁴¹Cf

Maseni broj	241
broj neutrona	143
Relative Atomic Mass	241,06369 ± 0,00018 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,35 ± 0,18 m
spin	7/2
nuclear quadrupole moment
datum otkrića	1970
parity	-

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

²⁴²Cf

Maseni broj	242
broj neutrona	144
Relative Atomic Mass	242,063754544 ± 0,00001384 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	3,49 ± 0,15 m
spin	0
nuclear quadrupole moment	0
datum otkrića	1967
parity	+

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

²⁴³Cf

Maseni broj	243
broj neutrona	145
Relative Atomic Mass	243,065475 ± 0,000194 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	10,8 ± 0,3 m
spin	1/2
nuclear quadrupole moment	0
datum otkrića	1967
parity	+

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

²⁴⁴Cf

Maseni broj	244
broj neutrona	146
Relative Atomic Mass	244,065999447 ± 0,000002809 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	19,5 ± 0,5 m
spin	0
nuclear quadrupole moment	0
datum otkrića	1956
parity	+

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

²⁴⁵Cf

Maseni broj	245
broj neutrona	147
Relative Atomic Mass	245,068046755 ± 0,000002606 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	45 ± 1,5 m
spin	1/2
nuclear quadrupole moment	0
datum otkrića	1956
parity	+

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

²⁴⁶Cf

Maseni broj	246
broj neutrona	148
Relative Atomic Mass	246,068803685 ± 0,000001625 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	35,7 ± 0,5 h
spin	0
nuclear quadrupole moment	0
datum otkrića	1951
parity	+

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

²⁴⁷Cf

Maseni broj	247
broj neutrona	149
Relative Atomic Mass	247,070971348 ± 0,00001538 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	3,11 ± 0,03 h
spin	7/2
nuclear quadrupole moment
datum otkrića	1954
parity	+

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

²⁴⁸Cf

Maseni broj	248
broj neutrona	150
Relative Atomic Mass	248,072182905 ± 0,000005497 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	333,5 ± 2,8 d
spin	0
nuclear quadrupole moment	0
datum otkrića	1954
parity	+

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

²⁴⁹Cf

Maseni broj	249
broj neutrona	151
Relative Atomic Mass	249,074850428 ± 0,000001269 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	351 ± 2 y
spin	9/2
nuclear quadrupole moment
datum otkrića	1954
parity	-

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

²⁵⁰Cf

Maseni broj	250
broj neutrona	152
Relative Atomic Mass	250,076404494 ± 0,00000165 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	13,08 ± 0,09 y
spin	0
nuclear quadrupole moment	0
datum otkrića	1954
parity	+

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

²⁵¹Cf

Maseni broj	251
broj neutrona	153
Relative Atomic Mass	251,079587171 ± 0,000004187 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	898 ± 44 y
spin	1/2
nuclear quadrupole moment	0
datum otkrića	1954
parity	+

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

²⁵²Cf

Maseni broj	252
broj neutrona	154
Relative Atomic Mass	252,081626507 ± 0,000002531 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,645 ± 0,008 y
spin	0
nuclear quadrupole moment	0
datum otkrića	1954
parity	+

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

²⁵³Cf

Maseni broj	253
broj neutrona	155
Relative Atomic Mass	253,085133723 ± 0,00000457 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	17,81 ± 0,08 d
spin	7/2
nuclear quadrupole moment
datum otkrića	1954
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	99.69%
α (α emission)	0.31%

²⁵⁴Cf

Maseni broj	254
broj neutrona	156
Relative Atomic Mass	254,087323575 ± 0,000012304 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	60,5 ± 0,2 d
spin	0
nuclear quadrupole moment	0
datum otkrića	1955
parity	+

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

²⁵⁵Cf

Maseni broj	255
broj neutrona	157
Relative Atomic Mass	255,091046 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	85 ± 18 m
spin	7/2
nuclear quadrupole moment
datum otkrića	1981
parity	+

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

²⁵⁶Cf

Maseni broj	256
broj neutrona	158
Relative Atomic Mass	256,093442 ± 0,000338 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	12,3 ± 1,2 m
spin	0
nuclear quadrupole moment	0
datum otkrića	1980
parity	+

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

historija

otkrivač ili izumitelj	G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
mjesto otkrića	United States
datum otkrića	1950
Etimologija	Named after the state and University of California.
pronunciation	kal-eh-FOR-ni-em (engleski)

izvor

Abundance
Abundance in Earth's crust
natural abundance (okean)
natural abundance (ljudsko tijelo)	0 %
natural abundance (Meteoroidi)	0 %
natural abundance (Sunce)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Californij[um] on ChemicalAid

Californij[um] (Cf)

Physical Property

Chemical Property

other

Isotopes of Californium

237Cf

238Cf

239Cf

240Cf

241Cf

242Cf

243Cf

244Cf

245Cf

246Cf

247Cf

248Cf

249Cf

250Cf

251Cf

252Cf

253Cf

254Cf

255Cf

256Cf

historija

izvor

Nuclear Screening Constants

²³⁷Cf

²³⁸Cf

²³⁹Cf

²⁴⁰Cf

²⁴¹Cf

²⁴²Cf

²⁴³Cf

²⁴⁴Cf

²⁴⁵Cf

²⁴⁶Cf

²⁴⁷Cf

²⁴⁸Cf

²⁴⁹Cf

²⁵⁰Cf

²⁵¹Cf

²⁵²Cf

²⁵³Cf

²⁵⁴Cf

²⁵⁵Cf

²⁵⁶Cf