Kalifoni

Kalifoni (Cf)

chemical element with the atomic number of 98
Atomic Number98
Atomic Weight251
mass number237
Group
Period7
Blockf
protoni98 p+
nyutroni139 n0
elektroni98 e-
Animated Bohr model of Cf (Kalifoni)

Physical Property

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

Chemical Property

nishati
proton affinity
electron affinity
ionization energy
ionization energy of Cf (Kalifoni)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
196 kJ/mol
elektroni
Mzingo elektroni2, 8, 18, 32, 28, 8, 2
Bohr model: Cf (Kalifoni)
valence electron2
Lewis structure: Cf (Kalifoni)
electron configuration[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 (Kalifoni)
Orbital Diagram of Cf (Kalifoni)
oxidation number2, 3, 4, 5
electronegativity
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
1,173.15 K
critical pressure
critical temperature
Kiwango utatu
appearance
Rangi
Colorless
appearancesilvery
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
superconductivity
Uga sumaku
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal StructureSimple Hexagonal ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
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

mass number237
neutron number139
relative atomic mass
237.062199272 ± 0.000104506 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
0.8 ± 0.2 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1995
parity+

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

238Cf

mass number238
neutron number140
relative atomic mass
238.06149 ± 0.00032 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
21.1 ± 1.3 ms
spin0
nuclear quadrupole moment
0
Uvumbuzi1995
parity+

hali ya kuozaintensity
SF (spontaneous fission)97.5%
α (α emission)2.5%

239Cf

mass number239
neutron number141
relative atomic mass
239.062482 ± 0.000129 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
28 ± 2 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1981
parity+

hali ya kuozaintensity
α (α emission)65%
β+ (β+ decay; β+ = ϵ + e+)

240Cf

mass number240
neutron number142
relative atomic mass
240.062253447 ± 0.00001936 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
40.3 ± 0.9 s
spin0
nuclear quadrupole moment
0
Uvumbuzi1970
parity+

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

241Cf

mass number241
neutron number143
relative atomic mass
241.06369 ± 0.00018 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.35 ± 0.18 m
spin7/2
nuclear quadrupole moment
Uvumbuzi1970
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)15%

242Cf

mass number242
neutron number144
relative atomic mass
242.063754544 ± 0.00001384 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
3.49 ± 0.15 m
spin0
nuclear quadrupole moment
0
Uvumbuzi1967
parity+

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

243Cf

mass number243
neutron number145
relative atomic mass
243.065475 ± 0.000194 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
10.8 ± 0.3 m
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1967
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)86%
α (α emission)14%

244Cf

mass number244
neutron number146
relative atomic mass
244.065999447 ± 0.000002809 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
19.5 ± 0.5 m
spin0
nuclear quadrupole moment
0
Uvumbuzi1956
parity+

hali ya kuozaintensity
α (α emission)75%
ϵ (electron capture)25%

245Cf

mass number245
neutron number147
relative atomic mass
245.068046755 ± 0.000002606 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
45 ± 1.5 m
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1956
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)64.7%
α (α emission)35.3%

246Cf

mass number246
neutron number148
relative atomic mass
246.068803685 ± 0.000001625 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
35.7 ± 0.5 h
spin0
nuclear quadrupole moment
0
Uvumbuzi1951
parity+

hali ya kuozaintensity
α (α emission)100%
SF (spontaneous fission)2.4%
ϵ (electron capture)

247Cf

mass number247
neutron number149
relative atomic mass
247.070971348 ± 0.00001538 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
3.11 ± 0.03 h
spin7/2
nuclear quadrupole moment
Uvumbuzi1954
parity+

hali ya kuozaintensity
ϵ (electron capture)99.965%
α (α emission)0.035%

248Cf

mass number248
neutron number150
relative atomic mass
248.072182905 ± 0.000005497 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
333.5 ± 2.8 d
spin0
nuclear quadrupole moment
0
Uvumbuzi1954
parity+

hali ya kuozaintensity
α (α emission)100%
SF (spontaneous fission)0.0029%

249Cf

mass number249
neutron number151
relative atomic mass
249.074850428 ± 0.000001269 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
351 ± 2 y
spin9/2
nuclear quadrupole moment
Uvumbuzi1954
parity-

hali ya kuozaintensity
α (α emission)100%
SF (spontaneous fission)5%

250Cf

mass number250
neutron number152
relative atomic mass
250.076404494 ± 0.00000165 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
13.08 ± 0.09 y
spin0
nuclear quadrupole moment
0
Uvumbuzi1954
parity+

hali ya kuozaintensity
α (α emission)99.923%
SF (spontaneous fission)0.077%

251Cf

mass number251
neutron number153
relative atomic mass
251.079587171 ± 0.000004187 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
898 ± 44 y
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1954
parity+

hali ya kuozaintensity
α (α emission)100%
SF (spontaneous fission)

252Cf

mass number252
neutron number154
relative atomic mass
252.081626507 ± 0.000002531 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.645 ± 0.008 y
spin0
nuclear quadrupole moment
0
Uvumbuzi1954
parity+

hali ya kuozaintensity
α (α emission)96.8972%
SF (spontaneous fission)3.1028%

253Cf

mass number253
neutron number155
relative atomic mass
253.085133723 ± 0.00000457 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
17.81 ± 0.08 d
spin7/2
nuclear quadrupole moment
Uvumbuzi1954
parity+

hali ya kuozaintensity
β (β decay)99.69%
α (α emission)0.31%

254Cf

mass number254
neutron number156
relative atomic mass
254.087323575 ± 0.000012304 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
60.5 ± 0.2 d
spin0
nuclear quadrupole moment
0
Uvumbuzi1955
parity+

hali ya kuozaintensity
SF (spontaneous fission)99.69%
α (α emission)0.31%
(double β decay)

255Cf

mass number255
neutron number157
relative atomic mass
255.091046 ± 0.000215 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
85 ± 18 m
spin7/2
nuclear quadrupole moment
Uvumbuzi1981
parity+

hali ya kuozaintensity
β (β decay)100%
SF (spontaneous fission)
α (α emission)

256Cf

mass number256
neutron number158
relative atomic mass
256.093442 ± 0.000338 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
12.3 ± 1.2 m
spin0
nuclear quadrupole moment
0
Uvumbuzi1980
parity+

hali ya kuozaintensity
SF (spontaneous fission)100%
α (α emission)
(double β decay)
Californium

historia

mgunduzi au mvumbuziG.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
location of discoveryUnited States
Uvumbuzi1950
EtimolojiaNamed after the state and University of California.
pronunciationkal-eh-FOR-ni-em (Kiingereza)

source

Abundance
Abundance in Earth's crust
natural abundance (Bahari)
natural abundance (Mwili)
0 %
natural abundance (Kimondo)
0 %
natural abundance (Jua)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants