Californium

Californium (Cf)

grundämne
Atomnummer98
Atommassa251
masstal237
Grupp
Period7
Blockf
Protoner98 p+
Neutroner139 n0
Electrons98 e-
Animated Bohrs atommodell of Cf (Californium)

Egenskaper

atomradie
molvolym
kovalent radie
168 pm
Metallic Radius
ionic radius
95 pm
Crystal Radius
109 pm
Van der Waalsradie
245 pm
densitet
15,1 g/cm³
energi
proton affinity
Elektronaffinitet
joniseringsenergi
6,2817 eV/particle
joniseringsenergi of Cf (Californium)
ångbildningsvärme
smältvärme
Bildningsentalpi
196 kJ/mol
Electrons
electron shell2, 8, 18, 32, 28, 8, 2
Bohrs atommodell: Cf (Californium)
valenselektron2
Elektronformel: Cf (Californium)
elektronkonfiguration[Rn] 5f10 7s2
Enhanced Bohrs atommodell of Cf (Californium)
Orbital Diagram of Cf (Californium)
oxidationstal2, 3, 4, 5
elektronegativitet
Electrophilicity
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
Smältpunkt
1 173,15 K
critical pressure
critical temperature
trippelpunkt
Visual
färg
Färglös
appearancesilvery
Brytningsindex
materialegenskap
Värmeledningsförmåga
termisk expansion
molar heat capacity
Specifik värmekapacitet
heat capacity ratio
electrical properties
type
elektrisk konduktivitet
resistivitet
supraledare
magnetism
type
magnetisk susceptibilitet (Mass)
magnetisk susceptibilitet (Molar)
magnetisk susceptibilitet (Volume)
magnetic ordering
Curiepunkten
Néel temperature
Structure
KristallstrukturEnkelt hexagonalt ()
Gitterkonstant
Lattice Anglesπ/2, π/2, 2 π/3
mekanisk materialegenskap
hårdhet
Kompressibilitet
skjuvmodul
Young's modulus
Poissons konstant
ljudhastighet
klassificering
KategoriAktinider, Actinides
CAS Group
IUPAC Group
Glawe Number42
Mendeleev Number32
Pettifor Number39
Geochemical Class
Goldschmidt classificationsynthetic
övrigt
Gas Basicity
Dipole Polarizability
122 ± 20 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
2 900
Neutron Mass Absorption
kvanttal5I8
rymdgrupp194 (P63/mmc)

Californiumisotoper

Stabila isotoper0
Instabila isotoper20
Radioactive Isotopes20

237Cf

natural abundanceRadioactive ☢️
relative atomic mass
237,062199272 ± 0,000104506 Da
masstal237
g-factor
Halveringstid
0,8 ± 0,2 s
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1995
Paritet+
237Cf Decay Modes
decay modeIntensitet
α (α emission)70%
SF (spontaneous fission)30%
β+ (β+ decay; β+ = ϵ + e+)%

238Cf

natural abundanceRadioactive ☢️
relative atomic mass
238,06149 ± 0,00032 Da
masstal238
g-factor
0
Halveringstid
21,1 ± 1,3 ms
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1995
Paritet+
238Cf Decay Modes
decay modeIntensitet
SF (spontaneous fission)97.5%
α (α emission)2.5%

239Cf

natural abundanceRadioactive ☢️
relative atomic mass
239,062482 ± 0,000129 Da
masstal239
g-factor
Halveringstid
28 ± 2 s
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1981
Paritet+
239Cf Decay Modes
decay modeIntensitet
α (α emission)65%
β+ (β+ decay; β+ = ϵ + e+)%

240Cf

natural abundanceRadioactive ☢️
relative atomic mass
240,062253447 ± 0,00001936 Da
masstal240
g-factor
0
Halveringstid
40,3 ± 0,9 s
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1970
Paritet+
240Cf Decay Modes
decay modeIntensitet
α (α emission)98.5%
SF (spontaneous fission)1.5%
β+ (β+ decay; β+ = ϵ + e+)%

241Cf

natural abundanceRadioactive ☢️
relative atomic mass
241,06369 ± 0,00018 Da
masstal241
g-factor
Halveringstid
2,35 ± 0,18 m
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1970
Paritet-
241Cf Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)15%

242Cf

natural abundanceRadioactive ☢️
relative atomic mass
242,063754544 ± 0,00001384 Da
masstal242
g-factor
0
Halveringstid
3,49 ± 0,15 m
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1967
Paritet+
242Cf Decay Modes
decay modeIntensitet
α (α emission)61%
β+ (β+ decay; β+ = ϵ + e+)39%
SF (spontaneous fission)0.014%

243Cf

natural abundanceRadioactive ☢️
relative atomic mass
243,065475 ± 0,000194 Da
masstal243
g-factor
Halveringstid
10,8 ± 0,3 m
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1967
Paritet+
243Cf Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)86%
α (α emission)14%

244Cf

natural abundanceRadioactive ☢️
relative atomic mass
244,065999447 ± 0,000002809 Da
masstal244
g-factor
0
Halveringstid
19,5 ± 0,5 m
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1956
Paritet+
244Cf Decay Modes
decay modeIntensitet
α (α emission)75%
ϵ (electron capture)25%

245Cf

natural abundanceRadioactive ☢️
relative atomic mass
245,068046755 ± 0,000002606 Da
masstal245
g-factor
Halveringstid
45 ± 1,5 m
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1956
Paritet+
245Cf Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)64.7%
α (α emission)35.3%

246Cf

natural abundanceRadioactive ☢️
relative atomic mass
246,068803685 ± 0,000001625 Da
masstal246
g-factor
0
Halveringstid
35,7 ± 0,5 h
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1951
Paritet+
246Cf Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)2.4%
ϵ (electron capture)%

247Cf

natural abundanceRadioactive ☢️
relative atomic mass
247,070971348 ± 0,00001538 Da
masstal247
g-factor
Halveringstid
3,11 ± 0,03 h
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet+
247Cf Decay Modes
decay modeIntensitet
ϵ (electron capture)99.965%
α (α emission)0.035%

248Cf

natural abundanceRadioactive ☢️
relative atomic mass
248,072182905 ± 0,000005497 Da
masstal248
g-factor
0
Halveringstid
333,5 ± 2,8 d
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+
248Cf Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)0.0029%

249Cf

natural abundanceRadioactive ☢️
relative atomic mass
249,074850428 ± 0,000001269 Da
masstal249
g-factor
Halveringstid
351 ± 2 y
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet-
249Cf Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)5%

250Cf

natural abundanceRadioactive ☢️
relative atomic mass
250,076404494 ± 0,00000165 Da
masstal250
g-factor
0
Halveringstid
13,08 ± 0,09 y
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+
250Cf Decay Modes
decay modeIntensitet
α (α emission)99.923%
SF (spontaneous fission)0.077%

251Cf

natural abundanceRadioactive ☢️
relative atomic mass
251,079587171 ± 0,000004187 Da
masstal251
g-factor
Halveringstid
898 ± 44 y
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+
251Cf Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)%

252Cf

natural abundanceRadioactive ☢️
relative atomic mass
252,081626507 ± 0,000002531 Da
masstal252
g-factor
0
Halveringstid
2,645 ± 0,008 y
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+
252Cf Decay Modes
decay modeIntensitet
α (α emission)96.8972%
SF (spontaneous fission)3.1028%

253Cf

natural abundanceRadioactive ☢️
relative atomic mass
253,085133723 ± 0,00000457 Da
masstal253
g-factor
Halveringstid
17,81 ± 0,08 d
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet+
253Cf Decay Modes
decay modeIntensitet
β− (β− decay)99.69%
α (α emission)0.31%

254Cf

natural abundanceRadioactive ☢️
relative atomic mass
254,087323575 ± 0,000012304 Da
masstal254
g-factor
0
Halveringstid
60,5 ± 0,2 d
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1955
Paritet+
254Cf Decay Modes
decay modeIntensitet
SF (spontaneous fission)99.69%
α (α emission)0.31%
2β− (double β− decay)%

255Cf

natural abundanceRadioactive ☢️
relative atomic mass
255,091046 ± 0,000215 Da
masstal255
g-factor
Halveringstid
85 ± 18 m
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1981
Paritet+
255Cf Decay Modes
decay modeIntensitet
β− (β− decay)100%
SF (spontaneous fission)%
α (α emission)%

256Cf

natural abundanceRadioactive ☢️
relative atomic mass
256,093442 ± 0,000338 Da
masstal256
g-factor
0
Halveringstid
12,3 ± 1,2 m
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1980
Paritet+
256Cf Decay Modes
decay modeIntensitet
SF (spontaneous fission)100%
α (α emission)%
2β− (double β− decay)%
Californium.jpg

historia

upptäckare eller uppfinnareG.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
fyndplatsUnited States
upptäcktsdatum1950
etymologiNamed after the state and University of California.
uttalkal-eh-FOR-ni-em (engelska)

Sources

Förekomst
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body
0 %
Abundance in Meteor
0 %
Abundance in Sun
0 %
Abundance in Universe
0 %

Nuclear Screening Constants

Californium on ChemicalAid