Mendelevium (Md)

chemical element with the atomic number of 101 and symbol Md

Atomic Number	101
Atomic Weight	258
Nombor jisim	244

Group
Period	7
Block	f

proton	101 p⁺
neutron	143 n⁰
Elektron	101 e^-

Sifat Fizikal

Jejari Atom
molar volume
Jejari kovalen	173 pm 139 pm
Metallic Radius
ionic radius	109.5 pm
Crystal Radius	123.5 pm
Jejari van der Waals	246 pm 327.4 pm
ketumpatan	10.3 g/cm³

Sifat Kimia

{ERROR}

tenaga

proton affinity
Pertalian elektron
ionization energy	6.58 eV/particle 10 eV/particle 24.3 eV/particle 40 eV/particle 54.1 eV/particle 76 eV/particle 96 eV/particle 115.1 eV/particle 143.9 eV/particle 162 eV/particle 187 eV/particle 215 eV/particle 240 eV/particle 260 eV/particle 282 eV/particle 307 eV/particle 334 eV/particle 360 eV/particle 386 eV/particle 412 eV/particle 438 eV/particle 462 eV/particle 486 eV/particle 659 eV/particle 690 eV/particle 723 eV/particle 760 eV/particle 794 eV/particle 828 eV/particle 885 eV/particle 920 eV/particle 958 eV/particle 994 eV/particle 1,160 eV/particle 1,200 eV/particle 1,250 eV/particle 1,290 eV/particle 1,430 eV/particle 1,480 eV/particle 1,620 eV/particle 1,660 eV/particle 1,840 eV/particle 1,930 eV/particle 2,020 eV/particle 2,110 eV/particle 2,200 eV/particle 2,290 eV/particle 2,380 eV/particle 2,000 eV/particle 2,580 eV/particle 2,680 eV/particle 2,760 eV/particle 2,860 eV/particle 2,950 eV/particle 3,050 eV/particle 3,513 eV/particle 3,592 eV/particle 3,675 eV/particle 3,762 eV/particle 3,845 eV/particle 3,926 eV/particle 4,109 eV/particle 4,194 eV/particle 4,286 eV/particle 4,371 eV/particle 4,720 eV/particle 4,800 eV/particle 4,890 eV/particle 4,970 eV/particle 5,580 eV/particle 5,680 eV/particle 5,930 eV/particle 6,030 eV/particle 9,430 eV/particle 9,620 eV/particle 9,810 eV/particle 10,020 eV/particle 10,220 eV/particle 10,410 eV/particle 10,930 eV/particle 11,130 eV/particle 11,360 eV/particle 11,560 eV/particle 12,140 eV/particle 12,310 eV/particle 12,500 eV/particle 12,680 eV/particle 14,560 eV/particle 14,800 eV/particle 15,200 eV/particle 15,400 eV/particle 31,000 eV/particle 31,500 eV/particle 32,000 eV/particle 32,500 eV/particle 39,500 eV/particle 40,100 eV/particle 41,000 eV/particle 41,548 eV/particle 164,764 eV/particle

Entalpi pengewapan
entalpi pelakuran
standard enthalpy of formation
Elektron

Petala elektron	2, 8, 18, 32, 31, 8, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Rn] 5f¹³ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹³ 7s²

Keadaan pengoksidaan	2, 3
Keelektronegatifan	0.23542
Electrophilicity Index
keadaan jirim asas

fasa jirim
gaseous state of matter
Boiling Point
Melting Point	1,100.15 K
critical pressure
critical temperature
triple point
rupa
warna	Black #ffffff #b30da6 #b30da6
rupa
indeks biasan
sifat bahan
Thermal Conductivity
Pengembangan terma
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Kekonduksian elektrik
Kerintangan dan kekonduksian elektrik
Kesuperkonduksian
kemagnetan
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	{ERROR}
lattice constant
Lattice Angles
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi
pengelasan
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	45
Mendeleev Number	38
Pettifor Number	36
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	109 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
Nombor kuantum	2F7/2
space group	()

Isotopes of Mendelevium

Stable Isotopes	0
Unstable Isotopes	19
Natural Isotopes	0

²⁴⁴Md

Nombor jisim	244
nombor neutron	143
Jisim Atom Relatif	244.081157 ± 0.000402 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	0.36 ± 0.14 s
Spin	3
nuclear quadrupole moment
tarikh penemuan	2020
parity	+

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

²⁴⁵Md

Nombor jisim	245
nombor neutron	144
Jisim Atom Relatif	245.080864 ± 0.000279 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	0.38 ± 0.1 s
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1996
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴⁶Md

Nombor jisim	246
nombor neutron	145
Jisim Atom Relatif	246.081713 ± 0.000279 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	0.92 ± 0.18 s
Spin	1
nuclear quadrupole moment
tarikh penemuan	1996
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²⁴⁷Md

Nombor jisim	247
nombor neutron	146
Jisim Atom Relatif	247.08152 ± 0.000223 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.19 ± 0.09 s
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1981
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	0.1%

²⁴⁸Md

Nombor jisim	248
nombor neutron	147
Jisim Atom Relatif	248.082607 ± 0.000198 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	7 ± 3 s
Spin
nuclear quadrupole moment
tarikh penemuan	1973
parity

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

²⁴⁹Md

Nombor jisim	249
nombor neutron	148
Jisim Atom Relatif	249.082857155 ± 0.000176516 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	25.6 ± 0.9 s
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1973
parity	-

decay mode	Keamatan (fizik)
α (α emission)	75%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁵⁰Md

Nombor jisim	250
nombor neutron	149
Jisim Atom Relatif	250.084164934 ± 0.000097606 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	54 ± 4 s
Spin	2
nuclear quadrupole moment
tarikh penemuan	1973
parity	-

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

²⁵¹Md

Nombor jisim	251
nombor neutron	150
Jisim Atom Relatif	251.084774287 ± 0.00002031 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	4.21 ± 0.23 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1973
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)	10%

²⁵²Md

Nombor jisim	252
nombor neutron	151
Jisim Atom Relatif	252.086385 ± 0.000098 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.3 ± 0.8 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1973
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

²⁵³Md

Nombor jisim	253
nombor neutron	152
Jisim Atom Relatif	253.087143 ± 0.000034 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	12 ± 8 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1992
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.7%

²⁵⁴Md

Nombor jisim	254
nombor neutron	153
Jisim Atom Relatif	254.08959 ± 0.000107 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	10 ± 3 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1970
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

²⁵⁵Md

Nombor jisim	255
nombor neutron	154
Jisim Atom Relatif	255.091081702 ± 0.000005976 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	27 ± 2 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1958
parity	-

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

²⁵⁶Md

Nombor jisim	256
nombor neutron	155
Jisim Atom Relatif	256.093888 ± 0.000133 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	77.7 ± 1.8 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1955
parity	-

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

²⁵⁷Md

Nombor jisim	257
nombor neutron	156
Jisim Atom Relatif	257.095537343 ± 0.000001683 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.52 ± 0.05 h
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1965
parity	-

decay mode	Keamatan (fizik)
ϵ (electron capture)	85%
α (α emission)	15%
SF (spontaneous fission)

²⁵⁸Md

Nombor jisim	258
nombor neutron	157
Jisim Atom Relatif	258.098433634 ± 0.000003729 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	51.59 ± 0.29 d
Spin	8
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.0015%
β⁻ (β⁻ decay)	0.0015%

²⁵⁹Md

Nombor jisim	259
nombor neutron	158
Jisim Atom Relatif	259.100445 ± 0.000108 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.6 ± 0.06 h
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1982
parity	-

decay mode	Keamatan (fizik)
SF (spontaneous fission)	100%
α (α emission)

²⁶⁰Md

Nombor jisim	260
nombor neutron	159
Jisim Atom Relatif	260.10365 ± 0.000339 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	27.8 ± 0.8 d
Spin
nuclear quadrupole moment
tarikh penemuan	1989
parity

decay mode	Keamatan (fizik)
SF (spontaneous fission)	100%
α (α emission)	5%
ϵ (electron capture)	5%
β⁻ (β⁻ decay)	3.5%

²⁶¹Md

Nombor jisim	261
nombor neutron	160
Jisim Atom Relatif	261.105828 ± 0.000546 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	7/2
nuclear quadrupole moment
tarikh penemuan
parity	-

decay mode	Keamatan (fizik)
α (α emission)

²⁶²Md

Nombor jisim	262
nombor neutron	161
Jisim Atom Relatif	262.109144 ± 0.000481 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin
nuclear quadrupole moment
tarikh penemuan
parity

decay mode	Keamatan (fizik)
SF (spontaneous fission)
α (α emission)

sejarah

penemu atau pereka	G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
tempat penemuan	United States
tarikh penemuan	1955
Etimologi	Named in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
sebutan	men-deh-LEE-vi-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust
natural abundance (lautan)
natural abundance (Tubuh manusia)	0 %
natural abundance (Meteoroid)	0 %
natural abundance (Matahari)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Mendelevium on ChemicalAid

Mendelevium (Md)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Mendelevium

244Md

245Md

246Md

247Md

248Md

249Md

250Md

251Md

252Md

253Md

254Md

255Md

256Md

257Md

258Md

259Md

260Md

261Md

262Md

sejarah

sumber

Nuclear Screening Constants

²⁴⁴Md

²⁴⁵Md

²⁴⁶Md

²⁴⁷Md

²⁴⁸Md

²⁴⁹Md

²⁵⁰Md

²⁵¹Md

²⁵²Md

²⁵³Md

²⁵⁴Md

²⁵⁵Md

²⁵⁶Md

²⁵⁷Md

²⁵⁸Md

²⁵⁹Md

²⁶⁰Md

²⁶¹Md

²⁶²Md