Mendelevium

Mendelevium (Md)

chemical element with the atomic number of 101 and symbol Md
Atomic Number101
Atomic Weight258
Massagetal244
Group
Period7
Blockf
proton101 p+
neutron143 n0
elektron101 e-
Animated Bohr model of Md (Mendelevium)

Physical Property

Atoomradius
molar volume
Covalent Radius
173 pm
Metallic Radius
Ioonradius
109,5 pm
Crystal Radius
123,5 pm
Van der Waals radius
246 pm
density
10,3 g/cm³

Chemical Property

energie
proton affinity
electron affinity
ionization energy
ionization energy of Md (Mendelevium)
Verdampingswarmte
smeltingswarmte
Vormingsentalpie
elektron
Elektronskil2, 8, 18, 32, 31, 8, 2
Bohr model: Md (Mendelevium)
Valenselektrone2
Lewisteorie: Md (Mendelevium)
elektronkonfigurasie[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 (Mendelevium)
Orbital Diagram of Md (Mendelevium)
Oksidasietoestand2, 3
Elektronegatiwiteit
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
kleur
Colorless
appearance
Brekingsindeks
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Geleidingsvermoë
Elektriese resistiwiteit
superconductivity
Magnetisme
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
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
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
Ruimtegroep ()

Isotopes of Mendelevium

Stable Isotopes0
Unstable Isotopes19
Natural Isotopes0

244Md

Massagetal244
neutron number143
relative atomic mass
244,081157 ± 0,000402 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
0,36 ± 0,14 s
spin3
nuclear quadrupole moment
ontdekkingsdatum2020
parity+

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

245Md

Massagetal245
neutron number144
relative atomic mass
245,080864 ± 0,000279 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
0,38 ± 0,1 s
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1996
parity-

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

246Md

Massagetal246
neutron number145
relative atomic mass
246,081713 ± 0,000279 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
0,92 ± 0,18 s
spin1
nuclear quadrupole moment
ontdekkingsdatum1996
parity-

decay modeintensity
α (α emission)100%

247Md

Massagetal247
neutron number146
relative atomic mass
247,08152 ± 0,000223 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,19 ± 0,09 s
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1981
parity-

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

248Md

Massagetal248
neutron number147
relative atomic mass
248,082607 ± 0,000198 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
7 ± 3 s
spin
nuclear quadrupole moment
ontdekkingsdatum1973
parity

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

249Md

Massagetal249
neutron number148
relative atomic mass
249,082857155 ± 0,000176516 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
25,6 ± 0,9 s
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1973
parity-

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

250Md

Massagetal250
neutron number149
relative atomic mass
250,084164934 ± 0,000097606 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
54 ± 4 s
spin2
nuclear quadrupole moment
ontdekkingsdatum1973
parity-

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

251Md

Massagetal251
neutron number150
relative atomic mass
251,084774287 ± 0,00002031 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4,21 ± 0,23 m
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1973
parity-

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

252Md

Massagetal252
neutron number151
relative atomic mass
252,086385 ± 0,000098 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,3 ± 0,8 m
spin1
nuclear quadrupole moment
ontdekkingsdatum1973
parity+

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

253Md

Massagetal253
neutron number152
relative atomic mass
253,087143 ± 0,000034 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
12 ± 8 m
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1992
parity-

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

254Md

Massagetal254
neutron number153
relative atomic mass
254,08959 ± 0,000107 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
10 ± 3 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1970
parity-

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

255Md

Massagetal255
neutron number154
relative atomic mass
255,091081702 ± 0,000005976 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
27 ± 2 m
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1958
parity-

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

256Md

Massagetal256
neutron number155
relative atomic mass
256,093888 ± 0,000133 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
77,7 ± 1,8 m
spin1
nuclear quadrupole moment
ontdekkingsdatum1955
parity-

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

257Md

Massagetal257
neutron number156
relative atomic mass
257,095537343 ± 0,000001683 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,52 ± 0,05 h
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1965
parity-

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

258Md

Massagetal258
neutron number157
relative atomic mass
258,098433634 ± 0,000003729 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
51,59 ± 0,29 d
spin8
nuclear quadrupole moment
ontdekkingsdatum1970
parity-

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

259Md

Massagetal259
neutron number158
relative atomic mass
259,100445 ± 0,000108 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,6 ± 0,06 h
spin7/2
nuclear quadrupole moment
ontdekkingsdatum1982
parity-

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

260Md

Massagetal260
neutron number159
relative atomic mass
260,10365 ± 0,000339 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
27,8 ± 0,8 d
spin
nuclear quadrupole moment
ontdekkingsdatum1989
parity

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

261Md

Massagetal261
neutron number160
relative atomic mass
261,105828 ± 0,000546 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin7/2
nuclear quadrupole moment
ontdekkingsdatum
parity-

decay modeintensity
α (α emission)

262Md

Massagetal262
neutron number161
relative atomic mass
262,109144 ± 0,000481 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin
nuclear quadrupole moment
ontdekkingsdatum
parity

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

geskiedenis

Ontdek deurG.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
ligging van ontdekkingUnited States
ontdekkingsdatum1955
etimologieNamed in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
uitspraakmen-deh-LEE-vi-em (Engels)

source

Abundance
Abundance in Earth's crust
natural abundance (oseaan)
natural abundance (human body)
0 %
natural abundance (Meteoroïde)
0 %
natural abundance (Son)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants