Curium

Curium (Cm)

chemical element with the atomic number of 96
Atomic Number96
Atomic Weight247
mass number231
Group
Period7
Blockf
proton96 p+
neutron135 n0
electron96 e-
Animated Bohr model of Cm (Curium)

Āhuatanga Ōkiko

Atomic Radius
molar volume
18.28 cm³/mol
covalent radius
166 pm
Metallic Radius
ionic radius
97 pm
Crystal Radius
111 pm
Van der Waals radius
245 pm
density
13.51 g/cm³

Chemical Property

energy
proton affinity
electron affinity
ionization energy
ionization energy of Cm (Curium)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
386 kJ/mol
electron
electron shell2, 8, 18, 32, 25, 9, 2
Bohr model: Cm (Curium)
valence electron2
Lewis structure: Cm (Curium)
electron configuration[Rn] 5f7 6d1 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f7 6d1 7s2
Enhanced Bohr model of Cm (Curium)
Orbital Diagram of Cm (Curium)
oxidation number3, 4, 5, 6
electronegativity
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
1,618.15 K
critical pressure
critical temperature
triple point
appearance
color
Silver
appearancesilvery metallic, glows purple in the dark
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
magnetism
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 Number40
Mendeleev Number28
Pettifor Number41
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
144 ± 25 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
60
Neutron Mass Absorption
quantum number9D2
space group194 (P63/mmc)

Isotopes of Curium

Stable Isotopes0
Unstable Isotopes22
Natural Isotopes0

231Cm

mass number231
neutron number135
relative atomic mass
231.050746 ± 0.000322 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3/2
nuclear quadrupole moment
time of discovery or invention
parity+

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

232Cm

mass number232
neutron number136
relative atomic mass
232.04974 ± 0.000216 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

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

233Cm

mass number233
neutron number137
relative atomic mass
233.050771485 ± 0.000087059 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
27 ± 10 s
spin3/2
nuclear quadrupole moment
time of discovery or invention2001
parity+

decay modeintensity
α (α emission)20%
β+ (β+ decay; β+ = ϵ + e+)80%

234Cm

mass number234
neutron number138
relative atomic mass
234.050158568 ± 0.000018333 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
52 ± 9 s
spin0
nuclear quadrupole moment
0
time of discovery or invention2001
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)71%
α (α emission)27%
SF (spontaneous fission)2%

235Cm

mass number235
neutron number139
relative atomic mass
235.051545 ± 0.00011 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
7 ± 3 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1981
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)4%

236Cm

mass number236
neutron number140
relative atomic mass
236.051372112 ± 0.000018931 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
6.8 ± 0.8 m
spin0
nuclear quadrupole moment
0
time of discovery or invention2010
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)82%
α (α emission)18%
SF (spontaneous fission)

237Cm

mass number237
neutron number141
relative atomic mass
237.052868988 ± 0.00007987 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention2002
parity+

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

238Cm

mass number238
neutron number142
relative atomic mass
238.053081606 ± 0.000013133 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
2.2 ± 0.4 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1994
parity+

decay modeintensity
ϵ (electron capture)
α (α emission)3.84%
SF (spontaneous fission)0.048%

239Cm

mass number239
neutron number143
relative atomic mass
239.054908519 ± 0.000161107 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.5 ± 0.4 h
spin7/2
nuclear quadrupole moment
time of discovery or invention1952
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)6.2%

240Cm

mass number240
neutron number144
relative atomic mass
240.055528233 ± 0.000002045 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
30.4 ± 3.7 d
spin0
nuclear quadrupole moment
0
time of discovery or invention1949
parity+

decay modeintensity
α (α emission)100%
ϵ (electron capture)
SF (spontaneous fission)3.9%

241Cm

mass number241
neutron number145
relative atomic mass
241.057651218 ± 0.000001725 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
32.8 ± 0.2 d
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1952
parity+

decay modeintensity
ϵ (electron capture)99%
α (α emission)1%

242Cm

mass number242
neutron number146
relative atomic mass
242.058834187 ± 0.000001224 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
162.8 ± 0.2 d
spin0
nuclear quadrupole moment
0
time of discovery or invention1949
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)6.2%
34Si1.1%
+ (double β+ decay)

243Cm

mass number243
neutron number147
relative atomic mass
243.061387329 ± 0.000001605 Da
g-factor
0.16 ± 0.032
natural abundance
radioactivity☢️ radioactive element
half-life
29.1 ± 0.1 y
spin5/2
nuclear quadrupole moment
time of discovery or invention1950
parity+

decay modeintensity
α (α emission)100%
ϵ (electron capture)0.29%
SF (spontaneous fission)5.3%

244Cm

mass number244
neutron number148
relative atomic mass
244.062750622 ± 0.000001187 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
18.11 ± 0.03 y
spin0
nuclear quadrupole moment
0
time of discovery or invention1950
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)1.37%

245Cm

mass number245
neutron number149
relative atomic mass
245.065491047 ± 0.000001233 Da
g-factor
0.14285714285714 ± 0.028571428571429
natural abundance
radioactivity☢️ radioactive element
half-life
8.25 ± 0.07 ky
spin7/2
nuclear quadrupole moment
time of discovery or invention1954
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)6.1%

246Cm

mass number246
neutron number150
relative atomic mass
246.067222016 ± 0.000001637 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
4.706 ± 0.04 ky
spin0
nuclear quadrupole moment
0
time of discovery or invention1954
parity+

decay modeintensity
α (α emission)99.97385%
SF (spontaneous fission)0.02615%

247Cm

mass number247
neutron number151
relative atomic mass
247.070352678 ± 0.000004076 Da
g-factor
0.08 ± 0.015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
15.6 ± 0.5 My
spin9/2
nuclear quadrupole moment
time of discovery or invention1954
parity-

decay modeintensity
α (α emission)100%

248Cm

mass number248
neutron number152
relative atomic mass
248.072349086 ± 0.000002531 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
348 ± 6 ky
spin0
nuclear quadrupole moment
0
time of discovery or invention1956
parity+

decay modeintensity
α (α emission)91.61%
SF (spontaneous fission)8.39%
(double β decay)

249Cm

mass number249
neutron number153
relative atomic mass
249.075953992 ± 0.000002545 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
64.15 ± 0.03 m
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1956
parity+

decay modeintensity
β (β decay)100%

250Cm

mass number250
neutron number154
relative atomic mass
250.078357541 ± 0.000011029 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1966
parity+

decay modeintensity
SF (spontaneous fission)74%
α (α emission)
β (β decay)

251Cm

mass number251
neutron number155
relative atomic mass
251.082284988 ± 0.000024367 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
16.8 ± 0.2 m
spin3/2
nuclear quadrupole moment
time of discovery or invention1978
parity+

decay modeintensity
β (β decay)100%

252Cm

mass number252
neutron number156
relative atomic mass
252.08487 ± 0.00032 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

decay modeintensity
β (β decay)
α (α emission)
Cm-Fluoreszenz

kōrero nehe

discoverer or inventorG.T.Seaborg, R.A.James, A.Ghiorso
location of discoveryUnited States
time of discovery or invention1944
etymologyNamed in honor of Pierre and Marie Curie.
pronunciationKYOOR-i-em (Ingarihi)

source

Abundance
Abundance in Earth's crust
natural abundance (Moana nui)
natural abundance (human body)
0 %
natural abundance (meteoroid)
0 %
natural abundance (Te Rā)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants