Curium

Curium (Cm)

grundämne
Atomnummer96
Atommassa247
masstal231
Grupp
Period7
Blockf
Protoner96 p+
Neutroner135 n0
Electrons96 e-
Animated Bohrs atommodell of Cm (Curium)

Egenskaper

atomradie
molvolym
18,28 cm³/mol
kovalent radie
166 pm
Metallic Radius
ionic radius
97 pm
Crystal Radius
111 pm
Van der Waalsradie
245 pm
densitet
13,51 g/cm³
energi
proton affinity
Elektronaffinitet
joniseringsenergi
5,9914 eV/particle
joniseringsenergi of Cm (Curium)
ångbildningsvärme
smältvärme
Bildningsentalpi
386 kJ/mol
Electrons
electron shell2, 8, 18, 32, 25, 9, 2
Bohrs atommodell: Cm (Curium)
valenselektron2
Elektronformel: Cm (Curium)
elektronkonfiguration[Rn] 5f7 6d1 7s2
Enhanced Bohrs atommodell of Cm (Curium)
Orbital Diagram of Cm (Curium)
oxidationstal3, 4, 5, 6
elektronegativitet
Electrophilicity
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
Smältpunkt
1 618,15 K
critical pressure
critical temperature
trippelpunkt
Visual
färg
Silver
appearancesilvery metallic, glows purple in the dark
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 Number40
Mendeleev Number28
Pettifor Number41
Geochemical Class
Goldschmidt classificationsynthetic
övrigt
Gas Basicity
Dipole Polarizability
144 ± 25 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
60
Neutron Mass Absorption
kvanttal9D2
rymdgrupp194 (P63/mmc)

Curiumisotoper

Stabila isotoper0
Instabila isotoper22
Radioactive Isotopes22

231Cm

natural abundanceRadioactive ☢️
relative atomic mass
231,050746 ± 0,000322 Da
masstal231
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum
Paritet+
231Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%

232Cm

natural abundanceRadioactive ☢️
relative atomic mass
232,04974 ± 0,000216 Da
masstal232
g-factor
0
Halveringstid
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum
Paritet+
232Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%

233Cm

natural abundanceRadioactive ☢️
relative atomic mass
233,050771485 ± 0,000087059 Da
masstal233
g-factor
Halveringstid
27 ± 10 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2001
Paritet+
233Cm Decay Modes
decay modeIntensitet
α (α emission)20%
β+ (β+ decay; β+ = ϵ + e+)80%

234Cm

natural abundanceRadioactive ☢️
relative atomic mass
234,050158568 ± 0,000018333 Da
masstal234
g-factor
0
Halveringstid
52 ± 9 s
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum2001
Paritet+
234Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)71%
α (α emission)27%
SF (spontaneous fission)2%

235Cm

natural abundanceRadioactive ☢️
relative atomic mass
235,051545 ± 0,00011 Da
masstal235
g-factor
Halveringstid
7 ± 3 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1981
Paritet+
235Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)4%

236Cm

natural abundanceRadioactive ☢️
relative atomic mass
236,051372112 ± 0,000018931 Da
masstal236
g-factor
0
Halveringstid
6,8 ± 0,8 m
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum2010
Paritet+
236Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)82%
α (α emission)18%
SF (spontaneous fission)%

237Cm

natural abundanceRadioactive ☢️
relative atomic mass
237,052868988 ± 0,00007987 Da
masstal237
g-factor
Halveringstid
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum2002
Paritet+
237Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
α (α emission)%

238Cm

natural abundanceRadioactive ☢️
relative atomic mass
238,053081606 ± 0,000013133 Da
masstal238
g-factor
0
Halveringstid
2,2 ± 0,4 h
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1994
Paritet+
238Cm Decay Modes
decay modeIntensitet
ϵ (electron capture)%
α (α emission)3.84%
SF (spontaneous fission)0.048%

239Cm

natural abundanceRadioactive ☢️
relative atomic mass
239,054908519 ± 0,000161107 Da
masstal239
g-factor
Halveringstid
2,5 ± 0,4 h
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1952
Paritet-
239Cm Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)6.2%

240Cm

natural abundanceRadioactive ☢️
relative atomic mass
240,055528233 ± 0,000002045 Da
masstal240
g-factor
0
Halveringstid
30,4 ± 3,7 d
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1949
Paritet+
240Cm Decay Modes
decay modeIntensitet
α (α emission)100%
ϵ (electron capture)%
SF (spontaneous fission)3.9%

241Cm

natural abundanceRadioactive ☢️
relative atomic mass
241,057651218 ± 0,000001725 Da
masstal241
g-factor
Halveringstid
32,8 ± 0,2 d
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1952
Paritet+
241Cm Decay Modes
decay modeIntensitet
ϵ (electron capture)99%
α (α emission)1%

242Cm

natural abundanceRadioactive ☢️
relative atomic mass
242,058834187 ± 0,000001224 Da
masstal242
g-factor
0
Halveringstid
162,8 ± 0,2 d
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1949
Paritet+
242Cm Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)6.2%
34Si1.1%
2β+ (double β+ decay)%

243Cm

natural abundanceRadioactive ☢️
relative atomic mass
243,061387329 ± 0,000001605 Da
masstal243
g-factor
0,16 ± 0,032
Halveringstid
29,1 ± 0,1 y
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1950
Paritet+
243Cm Decay Modes
decay modeIntensitet
α (α emission)100%
ϵ (electron capture)0.29%
SF (spontaneous fission)5.3%

244Cm

natural abundanceRadioactive ☢️
relative atomic mass
244,062750622 ± 0,000001187 Da
masstal244
g-factor
0
Halveringstid
18,11 ± 0,03 y
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1950
Paritet+
244Cm Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)1.37%

245Cm

natural abundanceRadioactive ☢️
relative atomic mass
245,065491047 ± 0,000001233 Da
masstal245
g-factor
0,14285714285714 ± 0,028571428571429
Halveringstid
8,25 ± 0,07 ky
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet+
245Cm Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)6.1%

246Cm

natural abundanceRadioactive ☢️
relative atomic mass
246,067222016 ± 0,000001637 Da
masstal246
g-factor
0
Halveringstid
4,706 ± 0,04 ky
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+
246Cm Decay Modes
decay modeIntensitet
α (α emission)99.97385%
SF (spontaneous fission)0.02615%

247Cm

natural abundanceRadioactive ☢️
relative atomic mass
247,070352678 ± 0,000004076 Da
masstal247
g-factor
0,08 ± 0,015555555555556
Halveringstid
15,6 ± 0,5 My
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet-
247Cm Decay Modes
decay modeIntensitet
α (α emission)100%

248Cm

natural abundanceRadioactive ☢️
relative atomic mass
248,072349086 ± 0,000002531 Da
masstal248
g-factor
0
Halveringstid
348 ± 6 ky
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1956
Paritet+
248Cm Decay Modes
decay modeIntensitet
α (α emission)91.61%
SF (spontaneous fission)8.39%
2β− (double β− decay)%

249Cm

natural abundanceRadioactive ☢️
relative atomic mass
249,075953992 ± 0,000002545 Da
masstal249
g-factor
Halveringstid
64,15 ± 0,03 m
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1956
Paritet+
249Cm Decay Modes
decay modeIntensitet
β− (β− decay)100%

250Cm

natural abundanceRadioactive ☢️
relative atomic mass
250,078357541 ± 0,000011029 Da
masstal250
g-factor
0
Halveringstid
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1966
Paritet+
250Cm Decay Modes
decay modeIntensitet
SF (spontaneous fission)74%
α (α emission)%
β− (β− decay)%

251Cm

natural abundanceRadioactive ☢️
relative atomic mass
251,082284988 ± 0,000024367 Da
masstal251
g-factor
Halveringstid
16,8 ± 0,2 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1978
Paritet+
251Cm Decay Modes
decay modeIntensitet
β− (β− decay)100%

252Cm

natural abundanceRadioactive ☢️
relative atomic mass
252,08487 ± 0,00032 Da
masstal252
g-factor
0
Halveringstid
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum
Paritet+
252Cm Decay Modes
decay modeIntensitet
β− (β− decay)%
α (α emission)%
Cm-Fluoreszenz.png

historia

upptäckare eller uppfinnareG.T.Seaborg, R.A.James, A.Ghiorso
fyndplatsUnited States
upptäcktsdatum1944
etymologiNamed in honor of Pierre and Marie Curie.
uttalKYOOR-i-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

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