Fermio

Fermio (Fm)

chemical element with the atomic number of 100
Atomic Number100
Atomic Weight257
Numero masico241
Group
Period7
Blockf
Protón100 p+
Neutrón141 n0
Electrón100 e-
Animated Modelo atomico de Bohr of Fm (Fermio)

Physical Property

Radio Atomico
molar volume
Radio covalent
Metallic Radius
Radio ionico
Crystal Radius
Radio de van der Waals
density

Chemical Property

enerchía
proton affinity
Afinidat electronica
ionization energy
ionization energy of Fm (Fermio)
Entalpía de vaporización
entalpía de fusión
standard enthalpy of formation
Electrón
electron shell2, 8, 18, 32, 30, 8, 2
Modelo atomico de Bohr: Fm (Fermio)
valence electron2
Lewis structure: Fm (Fermio)
electron configuration[Rn] 5f12 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f12 7s2
Enhanced Modelo atomico de Bohr of Fm (Fermio)
Orbital Diagram of Fm (Fermio)
Numero d'oxidación2, 3
Electronegatividat
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
Punto triple
appearance
Color
Colorless
appearance
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 Structure{ERROR}
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number44
Mendeleev Number36
Pettifor Number37
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
C6 Dispersion Coefficient
allotrope
Neutron cross section
5800
Neutron Mass Absorption
quantum number3H6
space group ()

Isotopes of Fermium

Stable Isotopes0
Unstable Isotopes20
Natural Isotopes0

241Fm

Numero masico241
neutron number141
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
730 ± 60 us
spin5/2
nuclear quadrupole moment
time of discovery or invention2008
parity+

decay modeintensity
SF (spontaneous fission)
α (α emission)14%
β+ (β+ decay; β+ = ϵ + e+)12%

242Fm

Numero masico242
neutron number142
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
800 ± 200 us
spin0
nuclear quadrupole moment
0
time of discovery or invention1975
parity+

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

243Fm

Numero masico243
neutron number143
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
231 ± 9 ms
spin7/2
nuclear quadrupole moment
time of discovery or invention1981
parity-

decay modeintensity
α (α emission)91%
SF (spontaneous fission)9%
β+ (β+ decay; β+ = ϵ + e+)

244Fm

Numero masico244
neutron number144
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
3.12 ± 0.08 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1967
parity+

decay modeintensity
SF (spontaneous fission)97%
β+ (β+ decay; β+ = ϵ + e+)2%
α (α emission)1%

245Fm

Numero masico245
neutron number145
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
4.2 ± 1.3 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1967
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)7%
SF (spontaneous fission)0.3%

246Fm

Numero masico246
neutron number146
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
1.54 ± 0.04 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1966
parity+

decay modeintensity
α (α emission)93.2%
SF (spontaneous fission)6.8%
ϵ (electron capture)1.3%

247Fm

Numero masico247
neutron number147
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
31 ± 1 s
spin7/2
nuclear quadrupole moment
time of discovery or invention1967
parity+

decay modeintensity
α (α emission)64%
β+ (β+ decay; β+ = ϵ + e+)

248Fm

Numero masico248
neutron number148
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
34.5 ± 1.2 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1958
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)
SF (spontaneous fission)0.1%

249Fm

Numero masico249
neutron number149
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
1.6 ± 0.1 m
spin7/2
nuclear quadrupole moment
time of discovery or invention1960
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)33%

250Fm

Numero masico250
neutron number150
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
31 ± 1.1 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1954
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)0.0069%
ϵ (electron capture)

251Fm

Numero masico251
neutron number151
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
5.3 ± 0.08 h
spin9/2
nuclear quadrupole moment
time of discovery or invention1957
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)98.2%
α (α emission)1.8%

252Fm

Numero masico252
neutron number152
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
25.39 ± 0.04 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1956
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)0.0023%
+ (double β+ decay)

253Fm

Numero masico253
neutron number153
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
3 ± 0.12 d
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1957
parity+

decay modeintensity
ϵ (electron capture)88%
α (α emission)12%

254Fm

Numero masico254
neutron number154
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
3.24 ± 0.002 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1954
parity+

decay modeintensity
α (α emission)99.9408%
SF (spontaneous fission)0.0592%

255Fm

Numero masico255
neutron number155
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
20.07 ± 0.07 h
spin7/2
nuclear quadrupole moment
time of discovery or invention1954
parity+

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

256Fm

Numero masico256
neutron number156
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
157.1 ± 1.3 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1955
parity+

decay modeintensity
SF (spontaneous fission)91.9%
α (α emission)8.1%

257Fm

Numero masico257
neutron number157
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
100.5 ± 0.2 d
spin9/2
nuclear quadrupole moment
time of discovery or invention1964
parity+

decay modeintensity
α (α emission)99.79%
SF (spontaneous fission)0.21%

258Fm

Numero masico258
neutron number158
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
370 ± 14 us
spin0
nuclear quadrupole moment
0
time of discovery or invention1971
parity+

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

259Fm

Numero masico259
neutron number159
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
1.5 ± 0.2 s
spin
nuclear quadrupole moment
time of discovery or invention1980
parity

decay modeintensity
SF (spontaneous fission)100%

260Fm

Numero masico260
neutron number160
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

decay modeintensity
SF (spontaneous fission)
Fermium-Ytterbium Alloy
Electron shell 100 Fermium

historia

discoverer or inventorArgonne, Los Alamos, U of Calif
location of discoveryUnited States
time of discovery or invention1953
EtimolochíaNamed in honor of the scientist Enrico Fermi.
pronunciationFER-mi-em (English)

source

Abundance
Abundance in Earth's crust
natural abundance (ocián)
natural abundance (human body)
0 %
natural abundance (meteoroid)
0 %
natural abundance (Sol)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants