--

-- (Md)

chemical element with the atomic number of 101 and symbol Md
Atomic Number101
Atomic Weight258
mass number244
Group
Period7
Blockf
પ્રોટોન101 p+
neutron143 n0
ઈલેક્ટ્રોન101 e-
Animated બૉહરનો સિદ્ધાંત of Md (--)

Physical Property

Atomic Radius
molar volume
Covalent Radius
173 pm
Metallic Radius
ionic radius
109.5 pm
Crystal Radius
123.5 pm
Van der Waals radius
246 pm
density
10.3 g/cm³

રાસાયણિક ગુણધર્મ

ઉર્જા
proton affinity
electron affinity
ionization energy
ionization energy of Md (--)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
ઈલેક્ટ્રોન
electron shell2, 8, 18, 32, 31, 8, 2
બૉહરનો સિદ્ધાંત: Md (--)
valence electron2
Lewis structure: Md (--)
electron configuration[Rn] 5f13 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f13 7s2
Enhanced બૉહરનો સિદ્ધાંત of Md (--)
Orbital Diagram of Md (--)
oxidation number2, 3
વિદ્યુતઋણતા
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
1,100.15 K
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 Number45
Mendeleev Number38
Pettifor Number36
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
109 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number2F7/2
space group ()

Isotopes of Mendelevium

Stable Isotopes0
Unstable Isotopes19
Natural Isotopes0

244Md

mass number244
neutron number143
relative atomic mass
244.081157 ± 0.000402 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0.36 ± 0.14 s
પ્રચક્રણ3
nuclear quadrupole moment
શોધની તારીખ2020
પૅરિટી+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)
β+ SF (β+-delayed fission)14%

245Md

mass number245
neutron number144
relative atomic mass
245.080864 ± 0.000279 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0.38 ± 0.1 s
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1996
પૅરિટી-

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

246Md

mass number246
neutron number145
relative atomic mass
246.081713 ± 0.000279 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0.92 ± 0.18 s
પ્રચક્રણ1
nuclear quadrupole moment
શોધની તારીખ1996
પૅરિટી-

decay modeintensity
α (α emission)100%

247Md

mass number247
neutron number146
relative atomic mass
247.08152 ± 0.000223 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.19 ± 0.09 s
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1981
પૅરિટી-

decay modeintensity
α (α emission)100%
SF (spontaneous fission)0.1%

248Md

mass number248
neutron number147
relative atomic mass
248.082607 ± 0.000198 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
7 ± 3 s
પ્રચક્રણ
nuclear quadrupole moment
શોધની તારીખ1973
પૅરિટી

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)80%
α (α emission)20%
β+ SF (β+-delayed fission)0.05%

249Md

mass number249
neutron number148
relative atomic mass
249.082857155 ± 0.000176516 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
25.6 ± 0.9 s
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1973
પૅરિટી-

decay modeintensity
α (α emission)75%
β+ (β+ decay; β+ = ϵ + e+)

250Md

mass number250
neutron number149
relative atomic mass
250.084164934 ± 0.000097606 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
54 ± 4 s
પ્રચક્રણ2
nuclear quadrupole moment
શોધની તારીખ1973
પૅરિટી-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)93%
α (α emission)7%
β+ SF (β+-delayed fission)0.026%

251Md

mass number251
neutron number150
relative atomic mass
251.084774287 ± 0.00002031 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4.21 ± 0.23 m
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1973
પૅરિટી-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)10%

252Md

mass number252
neutron number151
relative atomic mass
252.086385 ± 0.000098 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.3 ± 0.8 m
પ્રચક્રણ1
nuclear quadrupole moment
શોધની તારીખ1973
પૅરિટી+

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

253Md

mass number253
neutron number152
relative atomic mass
253.087143 ± 0.000034 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
12 ± 8 m
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1992
પૅરિટી-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.7%

254Md

mass number254
neutron number153
relative atomic mass
254.08959 ± 0.000107 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
10 ± 3 m
પ્રચક્રણ0
nuclear quadrupole moment
0
શોધની તારીખ1970
પૅરિટી-

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

255Md

mass number255
neutron number154
relative atomic mass
255.091081702 ± 0.000005976 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
27 ± 2 m
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1958
પૅરિટી-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)93%
α (α emission)7%
SF (spontaneous fission)

256Md

mass number256
neutron number155
relative atomic mass
256.093888 ± 0.000133 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
77.7 ± 1.8 m
પ્રચક્રણ1
nuclear quadrupole moment
શોધની તારીખ1955
પૅરિટી-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)90.8%
α (α emission)9.2%
SF (spontaneous fission)3%

257Md

mass number257
neutron number156
relative atomic mass
257.095537343 ± 0.000001683 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5.52 ± 0.05 h
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1965
પૅરિટી-

decay modeintensity
ϵ (electron capture)85%
α (α emission)15%
SF (spontaneous fission)

258Md

mass number258
neutron number157
relative atomic mass
258.098433634 ± 0.000003729 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
51.59 ± 0.29 d
પ્રચક્રણ8
nuclear quadrupole moment
શોધની તારીખ1970
પૅરિટી-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)0.0015%
β (β decay)0.0015%

259Md

mass number259
neutron number158
relative atomic mass
259.100445 ± 0.000108 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.6 ± 0.06 h
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ1982
પૅરિટી-

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

260Md

mass number260
neutron number159
relative atomic mass
260.10365 ± 0.000339 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
27.8 ± 0.8 d
પ્રચક્રણ
nuclear quadrupole moment
શોધની તારીખ1989
પૅરિટી

decay modeintensity
SF (spontaneous fission)100%
α (α emission)5%
ϵ (electron capture)5%
β (β decay)3.5%

261Md

mass number261
neutron number160
relative atomic mass
261.105828 ± 0.000546 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
પ્રચક્રણ7/2
nuclear quadrupole moment
શોધની તારીખ
પૅરિટી-

decay modeintensity
α (α emission)

262Md

mass number262
neutron number161
relative atomic mass
262.109144 ± 0.000481 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
પ્રચક્રણ
nuclear quadrupole moment
શોધની તારીખ
પૅરિટી

decay modeintensity
SF (spontaneous fission)
α (α emission)
Electron shell 101 Mendelevium

ઈતિહાસ

શોધક અથવા સંશોધકG.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
શોધનું સ્થળUnited States
શોધની તારીખ1955
etymologyNamed in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
ઉચ્ચારmen-deh-LEE-vi-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