Фермий

Фермий (Fm)

chemical element with the atomic number of 100
Atomic Number100
Atomic Weight257
Адади массавӣ241
Group
Period7
Blockf
proton100 p+
neutron141 n0
electron100 e-
Animated Bohr model of Fm (Фермий)

Хусусияти Физикӣ

Atomic Radius
molar volume
covalent radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
зичӣ

Chemical Property

энергия
proton affinity
electron affinity
ionization energy
ionization energy of Fm (Фермий)
enthalpy of vaporization
гармои гудозиш
standard enthalpy of formation
electron
Абри электронӣ2, 8, 18, 32, 30, 8, 2
Bohr model: Fm (Фермий)
valence electron2
Lewis structure: Fm (Фермий)
electron configuration[Rn] 5f12 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f12 7s2
Enhanced Bohr model of Fm (Фермий)
Orbital Diagram of Fm (Фермий)
oxidation number2, 3
electronegativity
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
appearance
Ранг
Colorless
appearance
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
навъ
electrical conductivity
electrical resistivity
superconductivity
magnetism
навъ
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
сохт
Crystal Structure ()
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
5 800
Neutron Mass Absorption
ададҳои квантӣ3H6
space group ()

Isotopes of Fermium

Stable Isotopes0
Unstable Isotopes20
Natural Isotopes0

241Fm

Адади массавӣ241
neutron number141
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
730 ± 60 us
spin5/2
nuclear quadrupole moment
таърихи кашф2008
parity+

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

242Fm

Адади массавӣ242
neutron number142
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
800 ± 200 us
spin0
nuclear quadrupole moment
0
таърихи кашф1975
parity+

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

243Fm

Адади массавӣ243
neutron number143
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
231 ± 9 ms
spin7/2
nuclear quadrupole moment
таърихи кашф1981
parity-

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

244Fm

Адади массавӣ244
neutron number144
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3,12 ± 0,08 ms
spin0
nuclear quadrupole moment
0
таърихи кашф1967
parity+

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

245Fm

Адади массавӣ245
neutron number145
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4,2 ± 1,3 s
spin1/2
nuclear quadrupole moment
0
таърихи кашф1967
parity+

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

246Fm

Адади массавӣ246
neutron number146
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
1,54 ± 0,04 s
spin0
nuclear quadrupole moment
0
таърихи кашф1966
parity+

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

247Fm

Адади массавӣ247
neutron number147
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
31 ± 1 s
spin7/2
nuclear quadrupole moment
таърихи кашф1967
parity+

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

248Fm

Адади массавӣ248
neutron number148
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
34,5 ± 1,2 s
spin0
nuclear quadrupole moment
0
таърихи кашф1958
parity+

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

249Fm

Адади массавӣ249
neutron number149
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,6 ± 0,1 m
spin7/2
nuclear quadrupole moment
таърихи кашф1960
parity+

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

250Fm

Адади массавӣ250
neutron number150
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
31 ± 1,1 m
spin0
nuclear quadrupole moment
0
таърихи кашф1954
parity+

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

251Fm

Адади массавӣ251
neutron number151
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5,3 ± 0,08 h
spin9/2
nuclear quadrupole moment
таърихи кашф1957
parity-

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

252Fm

Адади массавӣ252
neutron number152
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
25,39 ± 0,04 h
spin0
nuclear quadrupole moment
0
таърихи кашф1956
parity+

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

253Fm

Адади массавӣ253
neutron number153
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3 ± 0,12 d
spin1/2
nuclear quadrupole moment
0
таърихи кашф1957
parity+

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

254Fm

Адади массавӣ254
neutron number154
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3,24 ± 0,002 h
spin0
nuclear quadrupole moment
0
таърихи кашф1954
parity+

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

255Fm

Адади массавӣ255
neutron number155
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
20,07 ± 0,07 h
spin7/2
nuclear quadrupole moment
таърихи кашф1954
parity+

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

256Fm

Адади массавӣ256
neutron number156
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
157,1 ± 1,3 m
spin0
nuclear quadrupole moment
0
таърихи кашф1955
parity+

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

257Fm

Адади массавӣ257
neutron number157
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
100,5 ± 0,2 d
spin9/2
nuclear quadrupole moment
таърихи кашф1964
parity+

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

258Fm

Адади массавӣ258
neutron number158
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
370 ± 14 us
spin0
nuclear quadrupole moment
0
таърихи кашф1971
parity+

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

259Fm

Адади массавӣ259
neutron number159
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,5 ± 0,2 s
spin
nuclear quadrupole moment
таърихи кашф1980
parity

decay modeintensity
SF (spontaneous fission)100%

260Fm

Адади массавӣ260
neutron number160
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
таърихи кашф
parity+

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

таърих

кошифArgonne, Los Alamos, U of Calif
макони кашфUnited States
таърихи кашф1953
РешашиносӣNamed in honor of the scientist Enrico Fermi.
pronunciationFER-mi-em (Англисӣ)

source

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

Nuclear Screening Constants