Mendelevium (Md)

chemical element with the atomic number of 101 and symbol Md

Atomic Number	101
Atomic Weight	258
Numri i masës	244

Group
Period	7
Block	f

protoni	101 p⁺
neutroni	143 n⁰
elektroni	101 e^-

Tipar Fizik

Atomic Radius
molar volume
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

Chemical Property

energjia

proton affinity
electron affinity
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

enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
elektroni

electron shell	2, 8, 18, 32, 31, 8, 2

valence electron	2 ⓘ

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

oxidation number	2, 3
Elektronegativiteti	0.23542
Electrophilicity Index
fundamental state of matter

gjendja agregate e materies	Solid
gaseous state of matter
Boiling Point
Melting Point	1 100,15 K
critical pressure
critical temperature
triple point
appearance
Ngjyra	Colorless #ffffff #b30da6 #b30da6
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
Superpërcjellshmëria
Magnetizimi
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strukturë
Crystal Structure	()
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Shpejtësia e zërit
klasifikim
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
numër kuantik	2F7/2
space group	()

Isotopes of Mendelevium

Stable Isotopes	0
Unstable Isotopes	19
Natural Isotopes	0

²⁴⁴Md

Numri i masës	244
numri i neutroneve	143
Relative Atomic Mass	244,081157 ± 0,000402 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	0,36 ± 0,14 s
Spini	3
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2020
parity	+

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

²⁴⁵Md

Numri i masës	245
numri i neutroneve	144
Relative Atomic Mass	245,080864 ± 0,000279 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	0,38 ± 0,1 s
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1996
parity	-

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

²⁴⁶Md

Numri i masës	246
numri i neutroneve	145
Relative Atomic Mass	246,081713 ± 0,000279 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	0,92 ± 0,18 s
Spini	1
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1996
parity	-

decay mode	intensitet
α (α emission)	100%

²⁴⁷Md

Numri i masës	247
numri i neutroneve	146
Relative Atomic Mass	247,08152 ± 0,000223 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,19 ± 0,09 s
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1981
parity	-

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

²⁴⁸Md

Numri i masës	248
numri i neutroneve	147
Relative Atomic Mass	248,082607 ± 0,000198 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	7 ± 3 s
Spini
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1973
parity

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

²⁴⁹Md

Numri i masës	249
numri i neutroneve	148
Relative Atomic Mass	249,082857155 ± 0,000176516 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	25,6 ± 0,9 s
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1973
parity	-

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

²⁵⁰Md

Numri i masës	250
numri i neutroneve	149
Relative Atomic Mass	250,084164934 ± 0,000097606 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	54 ± 4 s
Spini	2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1973
parity	-

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

²⁵¹Md

Numri i masës	251
numri i neutroneve	150
Relative Atomic Mass	251,084774287 ± 0,00002031 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	4,21 ± 0,23 m
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1973
parity	-

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

²⁵²Md

Numri i masës	252
numri i neutroneve	151
Relative Atomic Mass	252,086385 ± 0,000098 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	2,3 ± 0,8 m
Spini	1
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1973
parity	+

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

²⁵³Md

Numri i masës	253
numri i neutroneve	152
Relative Atomic Mass	253,087143 ± 0,000034 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	12 ± 8 m
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1992
parity	-

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

²⁵⁴Md

Numri i masës	254
numri i neutroneve	153
Relative Atomic Mass	254,08959 ± 0,000107 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	10 ± 3 m
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1970
parity	-

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

²⁵⁵Md

Numri i masës	255
numri i neutroneve	154
Relative Atomic Mass	255,091081702 ± 0,000005976 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	27 ± 2 m
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1958
parity	-

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

²⁵⁶Md

Numri i masës	256
numri i neutroneve	155
Relative Atomic Mass	256,093888 ± 0,000133 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	77,7 ± 1,8 m
Spini	1
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1955
parity	-

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

²⁵⁷Md

Numri i masës	257
numri i neutroneve	156
Relative Atomic Mass	257,095537343 ± 0,000001683 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	5,52 ± 0,05 h
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1965
parity	-

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

²⁵⁸Md

Numri i masës	258
numri i neutroneve	157
Relative Atomic Mass	258,098433634 ± 0,000003729 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	51,59 ± 0,29 d
Spini	8
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1970
parity	-

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

²⁵⁹Md

Numri i masës	259
numri i neutroneve	158
Relative Atomic Mass	259,100445 ± 0,000108 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,6 ± 0,06 h
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1982
parity	-

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

²⁶⁰Md

Numri i masës	260
numri i neutroneve	159
Relative Atomic Mass	260,10365 ± 0,000339 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	27,8 ± 0,8 d
Spini
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1989
parity

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

²⁶¹Md

Numri i masës	261
numri i neutroneve	160
Relative Atomic Mass	261,105828 ± 0,000546 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	7/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity	-

decay mode	intensitet
α (α emission)

²⁶²Md

Numri i masës	262
numri i neutroneve	161
Relative Atomic Mass	262,109144 ± 0,000481 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity

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

historia

zbulues	G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
vendndodhja e zbulimit	United States
koha e zbulimit apo shpikjes	1955
Etimologjia	Named in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
pronunciation	men-deh-LEE-vi-em (anglisht)

burim

Abundance
Abundance in Earth's crust
natural abundance (Oqeani)
natural abundance (Trupi i njeriut)	0 %
natural abundance (meteoroid)	0 %
natural abundance (Diell)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Mendelevium on ChemicalAid

Australian Educational Vocabulary ID	scot/3543
ChEBI ID	33395
ChemSpider ID	22385
DSSTOX compound identifier	DTXCID90147877
DSSTox substance ID	DTXSID90225386
Den Store Danske ID	mendelevium
Elhuyar ZTH ID	028036
Encyclopedia of China (Third Edition) ID	185251
Encyclopedia of China ID (Second Edition)	220827
Encyclopædia Britannica Online ID	science/mendelevium
Encyclopædia Universalis ID	mendelevium
Freebase ID	/m/025s0rf
French Vikidia ID	Mendélévium
GND ID	4169413-2
Gran Enciclopèdia Catalana ID	0122687
Great Russian Encyclopedia Online ID	2204025
InChI	InChI=1S/Md
InChIKey	MQVSLOYRCXQRPM-UHFFFAOYSA-N
Interlingual Index ID	i113965
KBpedia ID	Mendelevium
MeSH descriptor ID	D008573
OmegaWiki Defined Meaning	335094
PubChem CID	23943
Quora topic ID	Mendelevium
Römpp online ID	RD-13-01207
Store norske leksikon ID	mendelevium
Treccani ID	mendelevio
UNII	LW3E571O0Z
USGS Thesaurus ID	1502
numri CAS	7440-11-1

Mendelevium (Md)

Tipar Fizik

Chemical Property

other

Isotopes of Mendelevium

244Md

245Md

246Md

247Md

248Md

249Md

250Md

251Md

252Md

253Md

254Md

255Md

256Md

257Md

258Md

259Md

260Md

261Md

262Md

historia

burim

Nuclear Screening Constants

²⁴⁴Md

²⁴⁵Md

²⁴⁶Md

²⁴⁷Md

²⁴⁸Md

²⁴⁹Md

²⁵⁰Md

²⁵¹Md

²⁵²Md

²⁵³Md

²⁵⁴Md

²⁵⁵Md

²⁵⁶Md

²⁵⁷Md

²⁵⁸Md

²⁵⁹Md

²⁶⁰Md

²⁶¹Md

²⁶²Md