ફર્મિયમનો

ફર્મિયમનો (Fm)

chemical element with the atomic number of 100
Atomic Number100
Atomic Weight257
mass number241
Group
Period7
Blockf
પ્રોટોન100 p+
neutron141 n0
ઈલેક્ટ્રોન100 e-
Animated બૉહરનો સિદ્ધાંત of Fm (ફર્મિયમનો)

Physical Property

Atomic Radius
molar volume
Covalent Radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
density

રાસાયણિક ગુણધર્મ

ઉર્જા
proton affinity
electron affinity
ionization energy
ionization energy of Fm (ફર્મિયમનો)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
ઈલેક્ટ્રોન
electron shell2, 8, 18, 32, 30, 8, 2
બૉહરનો સિદ્ધાંત: Fm (ફર્મિયમનો)
valence electron2
Lewis structure: Fm (ફર્મિયમનો)
electron configuration[Rn] 5f12 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f12 7s2
Enhanced બૉહરનો સિદ્ધાંત of Fm (ફર્મિયમનો)
Orbital Diagram of Fm (ફર્મિયમનો)
oxidation number2, 3
વિદ્યુતઋણતા
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
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 ()
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
અવાજની ઝડપ
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
quantum number3H6
space group ()

Isotopes of Fermium

Stable Isotopes0
Unstable Isotopes20
Natural Isotopes0

241Fm

mass number241
neutron number141
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
730 ± 60 us
પ્રચક્રણ5/2
nuclear quadrupole moment
શોધની તારીખ2008
પૅરિટી+

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

242Fm

mass number242
neutron number142
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
800 ± 200 us
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1975
પૅરિટી+

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

243Fm

mass number243
neutron number143
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
231 ± 9 ms
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1981
પૅરિટી-

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

244Fm

mass number244
neutron number144
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.12 ± 0.08 ms
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1967
પૅરિટી+

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

245Fm

mass number245
neutron number145
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4.2 ± 1.3 s
પ્રચક્રણ1/2
nuclear quadrupole moment
0
શોધની તારીખ1967
પૅરિટી+

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

246Fm

mass number246
neutron number146
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
1.54 ± 0.04 s
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1966
પૅરિટી+

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

247Fm

mass number247
neutron number147
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
31 ± 1 s
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1967
પૅરિટી+

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

248Fm

mass number248
neutron number148
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
34.5 ± 1.2 s
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1958
પૅરિટી+

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

249Fm

mass number249
neutron number149
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.6 ± 0.1 m
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1960
પૅરિટી+

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

250Fm

mass number250
neutron number150
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
31 ± 1.1 m
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1954
પૅરિટી+

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

251Fm

mass number251
neutron number151
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5.3 ± 0.08 h
પ્રચક્રણ9/2
nuclear quadrupole moment
શોધની તારીખ1957
પૅરિટી-

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

252Fm

mass number252
neutron number152
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
25.39 ± 0.04 h
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1956
પૅરિટી+

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

253Fm

mass number253
neutron number153
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3 ± 0.12 d
પ્રચક્રણ1/2
nuclear quadrupole moment
0
શોધની તારીખ1957
પૅરિટી+

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

254Fm

mass number254
neutron number154
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.24 ± 0.002 h
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1954
પૅરિટી+

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

255Fm

mass number255
neutron number155
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
20.07 ± 0.07 h
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1954
પૅરિટી+

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

256Fm

mass number256
neutron number156
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
157.1 ± 1.3 m
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1955
પૅરિટી+

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

257Fm

mass number257
neutron number157
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
100.5 ± 0.2 d
પ્રચક્રણ9/2
nuclear quadrupole moment
શોધની તારીખ1964
પૅરિટી+

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

258Fm

mass number258
neutron number158
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
370 ± 14 us
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1971
પૅરિટી+

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

259Fm

mass number259
neutron number159
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.5 ± 0.2 s
પ્રચક્રણ
nuclear quadrupole moment
શોધની તારીખ1980
પૅરિટી

decay modeintensity
SF (spontaneous fission)100%

260Fm

mass number260
neutron number160
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ
પૅરિટી+

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

ઈતિહાસ

શોધક અથવા સંશોધકArgonne, Los Alamos, U of Calif
શોધનું સ્થળUnited States
શોધની તારીખ1953
etymologyNamed in honor of the scientist Enrico Fermi.
ઉચ્ચારFER-mi-em (અંગ્રેજી)

source

Abundance
Abundance in Earth's crust
natural abundance (ocean)
natural abundance (માનવ શરીર)
0 %
natural abundance (ઉલ્કા)
0 %
natural abundance (સૂર્ય)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants