Mendelevyûm

Mendelevyûm (Md)

chemical element with the atomic number of 101 and symbol Md
Atomic Number101
Atomic Weight258
Hejmara baristeyî244
Group
Period7
Blockf
Proton101 p+
Notron143 n0
Kareva101 e-
Animated Bohr model of Md (Mendelevyûm)

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

Chemical Property

wize
proton affinity
electron affinity
ionization energy
ionization energy of Md (Mendelevyûm)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Kareva
electron shell2, 8, 18, 32, 31, 8, 2
Bohr model: Md (Mendelevyûm)
valence electron2
Lewis structure: Md (Mendelevyûm)
electron configuration[Rn] 5f13 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f13 7s2
Enhanced Bohr model of Md (Mendelevyûm)
Orbital Diagram of Md (Mendelevyûm)
oxidation number2, 3
electronegativity
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
Germahiya Curie
Néel temperature
pêkhate
Crystal Structure ()
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Leza dengê
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

Hejmara baristeyî244
neutron number143
Giraniya atomê
244,081157 ± 0,000402 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0,36 ± 0,14 s
spin3
nuclear quadrupole moment
dema îcadkirinê yan keşfê2020
parity+

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

245Md

Hejmara baristeyî245
neutron number144
Giraniya atomê
245,080864 ± 0,000279 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0,38 ± 0,1 s
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1996
parity-

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

246Md

Hejmara baristeyî246
neutron number145
Giraniya atomê
246,081713 ± 0,000279 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0,92 ± 0,18 s
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê1996
parity-

decay modeintensity
α (α emission)100%

247Md

Hejmara baristeyî247
neutron number146
Giraniya atomê
247,08152 ± 0,000223 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,19 ± 0,09 s
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1981
parity-

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

248Md

Hejmara baristeyî248
neutron number147
Giraniya atomê
248,082607 ± 0,000198 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
7 ± 3 s
spin
nuclear quadrupole moment
dema îcadkirinê yan keşfê1973
parity

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

249Md

Hejmara baristeyî249
neutron number148
Giraniya atomê
249,082857155 ± 0,000176516 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
25,6 ± 0,9 s
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1973
parity-

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

250Md

Hejmara baristeyî250
neutron number149
Giraniya atomê
250,084164934 ± 0,000097606 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
54 ± 4 s
spin2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1973
parity-

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

251Md

Hejmara baristeyî251
neutron number150
Giraniya atomê
251,084774287 ± 0,00002031 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4,21 ± 0,23 m
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1973
parity-

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

252Md

Hejmara baristeyî252
neutron number151
Giraniya atomê
252,086385 ± 0,000098 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2,3 ± 0,8 m
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê1973
parity+

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

253Md

Hejmara baristeyî253
neutron number152
Giraniya atomê
253,087143 ± 0,000034 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
12 ± 8 m
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1992
parity-

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

254Md

Hejmara baristeyî254
neutron number153
Giraniya atomê
254,08959 ± 0,000107 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
10 ± 3 m
spin0
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1970
parity-

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

255Md

Hejmara baristeyî255
neutron number154
Giraniya atomê
255,091081702 ± 0,000005976 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
27 ± 2 m
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1958
parity-

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

256Md

Hejmara baristeyî256
neutron number155
Giraniya atomê
256,093888 ± 0,000133 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
77,7 ± 1,8 m
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê1955
parity-

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

257Md

Hejmara baristeyî257
neutron number156
Giraniya atomê
257,095537343 ± 0,000001683 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5,52 ± 0,05 h
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1965
parity-

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

258Md

Hejmara baristeyî258
neutron number157
Giraniya atomê
258,098433634 ± 0,000003729 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
51,59 ± 0,29 d
spin8
nuclear quadrupole moment
dema îcadkirinê yan keşfê1970
parity-

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

259Md

Hejmara baristeyî259
neutron number158
Giraniya atomê
259,100445 ± 0,000108 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,6 ± 0,06 h
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1982
parity-

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

260Md

Hejmara baristeyî260
neutron number159
Giraniya atomê
260,10365 ± 0,000339 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
27,8 ± 0,8 d
spin
nuclear quadrupole moment
dema îcadkirinê yan keşfê1989
parity

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

261Md

Hejmara baristeyî261
neutron number160
Giraniya atomê
261,105828 ± 0,000546 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê
parity-

decay modeintensity
α (α emission)

262Md

Hejmara baristeyî262
neutron number161
Giraniya atomê
262,109144 ± 0,000481 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin
nuclear quadrupole moment
dema îcadkirinê yan keşfê
parity

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

dîrok

kaşîf an îcadkerG.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
location of discoveryUnited States
dema îcadkirinê yan keşfê1955
BêjenasîNamed in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
pronunciationmen-deh-LEE-vi-em (îngilîzî)

source

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

Nuclear Screening Constants