Mendeleevium (Md)

chemical element with the atomic number of 101 and symbol Md

Atomic Number	101
Atomic Weight	258
massiarv	244

Group
Period	7
Block	f

prooton	101 p⁺
neutron	143 n⁰
elektron	101 e^-

Animated Bohri aatomiteooria of Md (Mendeleevium)

Füüsikalised Omadused

Aatomiraadius
molaarruumala
Covalent Radius	173 pm 139 pm
Metallic Radius
ionic radius	109,5 pm
Crystal Radius	123,5 pm
Van der Waals radius	246 pm 327,4 pm
density	10,3 g/cm³

Keemilised Omadused

{ERROR}

energia

proton affinity
Elektronafiinsus
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

aurustumissoojus
sulamissoojus
standard enthalpy of formation
elektron

elektronkiht	2, 8, 18, 32, 31, 8, 2

valentselektron	2 ⓘ

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

oksüdatsiooniaste	2, 3
elektronegatiivsus	0.23542
Electrophilicity Index
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point
Melting Point	1 100,15 K
critical pressure
critical temperature
kolmikpunkt
Välimus
värvus	Black #ffffff #b30da6 #b30da6
Välimus
Murdumisnäitaja
thermodynamic material property
Thermal Conductivity
soojuspaisumine
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Elektrijuhtivus
Eritakistus
Ülijuhtivus
Magnetism
type
Magnetiline vastuvõtlikkus (Mass)
Magnetiline vastuvõtlikkus (Molar)
Magnetiline vastuvõtlikkus (Volume)
magnetic ordering
Curie punkt
Néel temperature
struktuur
Crystal Structure	{ERROR}
lattice constant
Lattice Angles
mechanical property
kõvadus
Ruumpaisumismoodul
Nihkeelastsusmoodul
Normaalelastsusmoodul
Poissoni tegur
heli kiirus
Klassifitseerimine
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	45
Mendeleev Number	38
Pettifor Number	36
Geochemical Class
Goldschmidt classification	synthetic

teine

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

Isotopes of Mendelevium

Stable Isotopes	0
Unstable Isotopes	19
Natural Isotopes	0

²⁴⁴Md

massiarv	244
neutron number	143
Relative Atomic Mass	244,081157 ± 0,000402 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	0,36 ± 0,14 s
spinn	3
nuclear quadrupole moment
avastamise aeg	2020
parity	+

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

²⁴⁵Md

massiarv	245
neutron number	144
Relative Atomic Mass	245,080864 ± 0,000279 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	0,38 ± 0,1 s
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1996
parity	-

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

²⁴⁶Md

massiarv	246
neutron number	145
Relative Atomic Mass	246,081713 ± 0,000279 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	0,92 ± 0,18 s
spinn	1
nuclear quadrupole moment
avastamise aeg	1996
parity	-

decay mode	Intensiivsus
α (α emission)	100%

²⁴⁷Md

massiarv	247
neutron number	146
Relative Atomic Mass	247,08152 ± 0,000223 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	1,19 ± 0,09 s
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1981
parity	-

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

²⁴⁸Md

massiarv	248
neutron number	147
Relative Atomic Mass	248,082607 ± 0,000198 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	7 ± 3 s
spinn
nuclear quadrupole moment
avastamise aeg	1973
parity

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

²⁴⁹Md

massiarv	249
neutron number	148
Relative Atomic Mass	249,082857155 ± 0,000176516 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	25,6 ± 0,9 s
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1973
parity	-

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

²⁵⁰Md

massiarv	250
neutron number	149
Relative Atomic Mass	250,084164934 ± 0,000097606 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	54 ± 4 s
spinn	2
nuclear quadrupole moment
avastamise aeg	1973
parity	-

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

²⁵¹Md

massiarv	251
neutron number	150
Relative Atomic Mass	251,084774287 ± 0,00002031 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	4,21 ± 0,23 m
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1973
parity	-

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

²⁵²Md

massiarv	252
neutron number	151
Relative Atomic Mass	252,086385 ± 0,000098 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	2,3 ± 0,8 m
spinn	1
nuclear quadrupole moment
avastamise aeg	1973
parity	+

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

²⁵³Md

massiarv	253
neutron number	152
Relative Atomic Mass	253,087143 ± 0,000034 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	12 ± 8 m
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1992
parity	-

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

²⁵⁴Md

massiarv	254
neutron number	153
Relative Atomic Mass	254,08959 ± 0,000107 Da
g-factor	0
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	10 ± 3 m
spinn	0
nuclear quadrupole moment	0
avastamise aeg	1970
parity	-

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

²⁵⁵Md

massiarv	255
neutron number	154
Relative Atomic Mass	255,091081702 ± 0,000005976 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	27 ± 2 m
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1958
parity	-

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

²⁵⁶Md

massiarv	256
neutron number	155
Relative Atomic Mass	256,093888 ± 0,000133 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	77,7 ± 1,8 m
spinn	1
nuclear quadrupole moment
avastamise aeg	1955
parity	-

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

²⁵⁷Md

massiarv	257
neutron number	156
Relative Atomic Mass	257,095537343 ± 0,000001683 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	5,52 ± 0,05 h
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1965
parity	-

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

²⁵⁸Md

massiarv	258
neutron number	157
Relative Atomic Mass	258,098433634 ± 0,000003729 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	51,59 ± 0,29 d
spinn	8
nuclear quadrupole moment
avastamise aeg	1970
parity	-

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

²⁵⁹Md

massiarv	259
neutron number	158
Relative Atomic Mass	259,100445 ± 0,000108 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	1,6 ± 0,06 h
spinn	7/2
nuclear quadrupole moment
avastamise aeg	1982
parity	-

decay mode	Intensiivsus
SF (spontaneous fission)	100%
α (α emission)

²⁶⁰Md

massiarv	260
neutron number	159
Relative Atomic Mass	260,10365 ± 0,000339 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	27,8 ± 0,8 d
spinn
nuclear quadrupole moment
avastamise aeg	1989
parity

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

²⁶¹Md

massiarv	261
neutron number	160
Relative Atomic Mass	261,105828 ± 0,000546 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn	7/2
nuclear quadrupole moment
avastamise aeg
parity	-

decay mode	Intensiivsus
α (α emission)

²⁶²Md

massiarv	262
neutron number	161
Relative Atomic Mass	262,109144 ± 0,000481 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn
nuclear quadrupole moment
avastamise aeg
parity

decay mode	Intensiivsus
SF (spontaneous fission)
α (α emission)

ajalugu

leiutaja või avastaja	G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
location of discovery	United States
avastamise aeg	1955
etümoloogia	Named in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
pronunciation	men-deh-LEE-vi-em (inglise)

allikas

Abundance
Abundance in Earth's crust
natural abundance (ookean)
natural abundance (Inimkeha)	0 %
natural abundance (meteoorkeha)	0 %
natural abundance (Päike)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Mendeleevium on ChemicalAid

Mendeleevium (Md)

Füüsikalised Omadused

Keemilised Omadused

teine

Isotopes of Mendelevium

244Md

245Md

246Md

247Md

248Md

249Md

250Md

251Md

252Md

253Md

254Md

255Md

256Md

257Md

258Md

259Md

260Md

261Md

262Md

ajalugu

allikas

Nuclear Screening Constants

²⁴⁴Md

²⁴⁵Md

²⁴⁶Md

²⁴⁷Md

²⁴⁸Md

²⁴⁹Md

²⁵⁰Md

²⁵¹Md

²⁵²Md

²⁵³Md

²⁵⁴Md

²⁵⁵Md

²⁵⁶Md

²⁵⁷Md

²⁵⁸Md

²⁵⁹Md

²⁶⁰Md

²⁶¹Md

²⁶²Md