Californi

Californi (Cf)

chemical element with the atomic number of 98
Atomic Number98
Atomic Weight251
Rhif màs237
Group
Period7
Blockf
Proton98 p+
Niwtron139 n0
Electron98 e-
Animated Bohr model of Cf (Californi)

Nodwedd Ffisegol

Atomic Radius
molar volume
covalent radius
168 pm
Metallic Radius
ionic radius
95 pm
Crystal Radius
109 pm
Van der Waals radius
245 pm
density
15.1 g/cm³

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
ionization energy of Cf (Californi)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
196 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 32, 28, 8, 2
Bohr model: Cf (Californi)
valence electron2
Lewis structure: Cf (Californi)
trefn yr electronnau[Rn] 5f10 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f10 7s2
Enhanced Bohr model of Cf (Californi)
Orbital Diagram of Cf (Californi)
Cyflwr ocsidiad2, 3, 4, 5
Electronegatifedd
Electrophilicity Index
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
Melting Point
1,173.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Colorless
appearancesilvery
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
dargludedd trydanol
Gwrthedd
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureSimple Hexagonal ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number42
Mendeleev Number32
Pettifor Number39
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
122 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
2,900
Neutron Mass Absorption
quantum number5I8
space group194 (P63/mmc)

Isotopes of Californium

Stable Isotopes0
Unstable Isotopes20
Natural Isotopes0

237Cf

Rhif màs237
neutron number139
relative atomic mass
237.062199272 ± 0.000104506 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
0.8 ± 0.2 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1995
parity+

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

238Cf

Rhif màs238
neutron number140
relative atomic mass
238.06149 ± 0.00032 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
21.1 ± 1.3 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1995
parity+

decay modeintensity
SF (spontaneous fission)97.5%
α (α emission)2.5%

239Cf

Rhif màs239
neutron number141
relative atomic mass
239.062482 ± 0.000129 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
28 ± 2 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1981
parity+

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

240Cf

Rhif màs240
neutron number142
relative atomic mass
240.062253447 ± 0.00001936 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
40.3 ± 0.9 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1970
parity+

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

241Cf

Rhif màs241
neutron number143
relative atomic mass
241.06369 ± 0.00018 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.35 ± 0.18 m
spin7/2
nuclear quadrupole moment
dyddiad darganfod1970
parity-

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

242Cf

Rhif màs242
neutron number144
relative atomic mass
242.063754544 ± 0.00001384 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.49 ± 0.15 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

243Cf

Rhif màs243
neutron number145
relative atomic mass
243.065475 ± 0.000194 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
10.8 ± 0.3 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

244Cf

Rhif màs244
neutron number146
relative atomic mass
244.065999447 ± 0.000002809 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
19.5 ± 0.5 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1956
parity+

decay modeintensity
α (α emission)75%
ϵ (electron capture)25%

245Cf

Rhif màs245
neutron number147
relative atomic mass
245.068046755 ± 0.000002606 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
45 ± 1.5 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1956
parity+

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

246Cf

Rhif màs246
neutron number148
relative atomic mass
246.068803685 ± 0.000001625 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
35.7 ± 0.5 h
spin0
nuclear quadrupole moment
0
dyddiad darganfod1951
parity+

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

247Cf

Rhif màs247
neutron number149
relative atomic mass
247.070971348 ± 0.00001538 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.11 ± 0.03 h
spin7/2
nuclear quadrupole moment
dyddiad darganfod1954
parity+

decay modeintensity
ϵ (electron capture)99.965%
α (α emission)0.035%

248Cf

Rhif màs248
neutron number150
relative atomic mass
248.072182905 ± 0.000005497 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
333.5 ± 2.8 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1954
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)0.0029%

249Cf

Rhif màs249
neutron number151
relative atomic mass
249.074850428 ± 0.000001269 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
351 ± 2 y
spin9/2
nuclear quadrupole moment
dyddiad darganfod1954
parity-

decay modeintensity
α (α emission)100%
SF (spontaneous fission)5%

250Cf

Rhif màs250
neutron number152
relative atomic mass
250.076404494 ± 0.00000165 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.08 ± 0.09 y
spin0
nuclear quadrupole moment
0
dyddiad darganfod1954
parity+

decay modeintensity
α (α emission)99.923%
SF (spontaneous fission)0.077%

251Cf

Rhif màs251
neutron number153
relative atomic mass
251.079587171 ± 0.000004187 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
898 ± 44 y
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1954
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)

252Cf

Rhif màs252
neutron number154
relative atomic mass
252.081626507 ± 0.000002531 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.645 ± 0.008 y
spin0
nuclear quadrupole moment
0
dyddiad darganfod1954
parity+

decay modeintensity
α (α emission)96.8972%
SF (spontaneous fission)3.1028%

253Cf

Rhif màs253
neutron number155
relative atomic mass
253.085133723 ± 0.00000457 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.81 ± 0.08 d
spin7/2
nuclear quadrupole moment
dyddiad darganfod1954
parity+

decay modeintensity
β (β decay)99.69%
α (α emission)0.31%

254Cf

Rhif màs254
neutron number156
relative atomic mass
254.087323575 ± 0.000012304 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
60.5 ± 0.2 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1955
parity+

decay modeintensity
SF (spontaneous fission)99.69%
α (α emission)0.31%
(double β decay)

255Cf

Rhif màs255
neutron number157
relative atomic mass
255.091046 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
85 ± 18 m
spin7/2
nuclear quadrupole moment
dyddiad darganfod1981
parity+

decay modeintensity
β (β decay)100%
SF (spontaneous fission)
α (α emission)

256Cf

Rhif màs256
neutron number158
relative atomic mass
256.093442 ± 0.000338 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
12.3 ± 1.2 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1980
parity+

decay modeintensity
SF (spontaneous fission)100%
α (α emission)
(double β decay)
Californium

hanes

darganfyddwr neu ddyfeisiwrG.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
man darganfodUnited States
dyddiad darganfod1950
geirdarddiadNamed after the state and University of California.
ynganiadkal-eh-FOR-ni-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
natural abundance (corff dynol)
0 %
natural abundance (Awyrfaen)
0 %
natural abundance (Haul)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants