Einsteiniyûm (Es)

chemical element with the atomic number of 99

Atomic Number	99
Atomic Weight	252
Hejmara baristeyî	239

Group
Period	7
Block	f

Proton	99 p⁺
Notron	140 n⁰
Kareva	99 e^-

Animated Bohr model of Es (Einsteiniyûm)

Physical Property

Atomic Radius
molar volume
Covalent Radius	165 pm 140 pm
Metallic Radius
ionic radius	111,6 pm
Crystal Radius	125,6 pm
Van der Waals radius	245 pm 329,9 pm
density	8,84 g/cm³

Chemical Property

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wize

proton affinity
electron affinity
ionization energy	6,3676 eV/particle 12,2 eV/particle 22,7 eV/particle 38,8 eV/particle 54,1 eV/particle 71 eV/particle 97 eV/particle 112,9 eV/particle 137 eV/particle 157 eV/particle 180 eV/particle 206 eV/particle 231 eV/particle 252 eV/particle 270 eV/particle 294 eV/particle 317 eV/particle 342 eV/particle 367 eV/particle 398 eV/particle 421 eV/particle 576 eV/particle 606 eV/particle 638 eV/particle 672 eV/particle 705 eV/particle 738 eV/particle 790 eV/particle 824 eV/particle 861 eV/particle 895 eV/particle 1.060 eV/particle 1.100 eV/particle 1.140 eV/particle 1.180 eV/particle 1.310 eV/particle 1.360 eV/particle 1.480 eV/particle 1.530 eV/particle 1.690 eV/particle 1.780 eV/particle 1.870 eV/particle 1.950 eV/particle 2.040 eV/particle 2.130 eV/particle 2.220 eV/particle 2.300 eV/particle 2.410 eV/particle 2.490 eV/particle 2.580 eV/particle 2.680 eV/particle 2.760 eV/particle 2.900 eV/particle 3.294 eV/particle 3.370 eV/particle 3.449 eV/particle 3.535 eV/particle 3.616 eV/particle 3.694 eV/particle 3.866 eV/particle 3.947 eV/particle 4.038 eV/particle 4.120 eV/particle 4.456 eV/particle 4.537 eV/particle 4.620 eV/particle 4.700 eV/particle 5.260 eV/particle 5.350 eV/particle 5.600 eV/particle 5.690 eV/particle 8.960 eV/particle 9.140 eV/particle 9.330 eV/particle 9.530 eV/particle 9.720 eV/particle 9.910 eV/particle 10.400 eV/particle 10.590 eV/particle 10.810 eV/particle 11.010 eV/particle 11.570 eV/particle 11.740 eV/particle 11.930 eV/particle 12.110 eV/particle 13.810 eV/particle 14.030 eV/particle 14.460 eV/particle 14.700 eV/particle 29.700 eV/particle 30.100 eV/particle 30.700 eV/particle 31.100 eV/particle 37.400 eV/particle 38.100 eV/particle 38.900 eV/particle 39.451,4 eV/particle 154.328 eV/particle 156.926 eV/particle

enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation	133 kJ/mol
Kareva

electron shell	2, 8, 18, 32, 29, 8, 2

valence electron	2 ⓘ

electron configuration	[Rn] 5f¹¹ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹¹ 7s²

oxidation number	2, 3, 4
electronegativity	0.21427
Electrophilicity Index
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point
Melting Point	1.133,15 K
critical pressure
critical temperature
triple point
appearance
color	Black #ffffff #b31fd4 #b31fd4
appearance	silver-colored
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	{ERROR}
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Leza dengê
classification
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	43
Mendeleev Number	34
Pettifor Number	38
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	118 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	160
Neutron Mass Absorption
quantum number	5I15/2
space group	()

Isotopes of Einsteinium

Stable Isotopes	0
Unstable Isotopes	20
Natural Isotopes	0

²³⁹Es

Hejmara baristeyî	239
neutron number	140
Giraniya Atomê	239,06831 ± 0,000322 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê
parity	-

decay mode	intensity
α (α emission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
SF (spontaneous fission)

²⁴⁰Es

Hejmara baristeyî	240
neutron number	141
Giraniya Atomê	240,068949 ± 0,000393 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	6 ± 1,7 s
spin	4
nuclear quadrupole moment
dema îcadkirinê yan keşfê	2017
parity	-

decay mode	intensity
α (α emission)	70%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	30%
β⁺ SF (β⁺-delayed fission)	0.16%

²⁴¹Es

Hejmara baristeyî	241
neutron number	142
Giraniya Atomê	241,068592 ± 0,000248 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	5,1 ± 0,8 s
spin	3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1996
parity	-

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

²⁴²Es

Hejmara baristeyî	242
neutron number	143
Giraniya Atomê	242,069567 ± 0,000276 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	17,8 ± 1,6 s
spin	2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1994
parity	+

decay mode	intensity
α (α emission)	57%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	43%
β⁺ SF (β⁺-delayed fission)	0.6%

²⁴³Es

Hejmara baristeyî	243
neutron number	144
Giraniya Atomê	243,069508 ± 0,000222 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	22,1 ± 1,4 s
spin	7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1973
parity	+

decay mode	intensity
α (α emission)	61%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
SF (spontaneous fission)	1%

²⁴⁴Es

Hejmara baristeyî	244
neutron number	145
Giraniya Atomê	244,070881 ± 0,000195 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	37 ± 4 s
spin	6
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1973
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	95%
α (α emission)	5%
β⁺ SF (β⁺-delayed fission)	0.011%

²⁴⁵Es

Hejmara baristeyî	245
neutron number	146
Giraniya Atomê	245,071192 ± 0,000178 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	1,11 ± 0,06 m
spin	3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1967
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	51%
α (α emission)	49%

²⁴⁶Es

Hejmara baristeyî	246
neutron number	147
Giraniya Atomê	246,072806474 ± 0,000096538 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	7,5 ± 0,5 m
spin	4
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1954
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	90.1%
α (α emission)	9.9%
β⁺ SF (β⁺-delayed fission)	0.003%

²⁴⁷Es

Hejmara baristeyî	247
neutron number	148
Giraniya Atomê	247,073621929 ± 0,00002087 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	4,55 ± 0,26 m
spin	7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1967
parity	+

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

²⁴⁸Es

Hejmara baristeyî	248
neutron number	149
Giraniya Atomê	248,075469 ± 0,000056 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	24 ± 3 m
spin	2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1956
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.25%
β⁺ SF (β⁺-delayed fission)	3.5%

²⁴⁹Es

Hejmara baristeyî	249
neutron number	150
Giraniya Atomê	249,076409 ± 0,000032 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	102,2 ± 0,6 m
spin	7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1956
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.57%

²⁵⁰Es

Hejmara baristeyî	250
neutron number	151
Giraniya Atomê	250,078611 ± 0,000107 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	8,6 ± 0,1 h
spin	6
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1956
parity

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

²⁵¹Es

Hejmara baristeyî	251
neutron number	152
Giraniya Atomê	251,079991431 ± 0,000005676 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	33 ± 1 h
spin	3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1956
parity	-

decay mode	intensity
ϵ (electron capture)	99.5%
α (α emission)	0.5%

²⁵²Es

Hejmara baristeyî	252
neutron number	153
Giraniya Atomê	252,082979173 ± 0,000053736 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	471,7 ± 1,9 d
spin	4
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1956
parity	+

decay mode	intensity
α (α emission)	78%
ϵ (electron capture)	22%

²⁵³Es

Hejmara baristeyî	253
neutron number	154
Giraniya Atomê	253,084821241 ± 0,000001341 Da
g-factor	1,1714285714286 ± 0,02
natural abundance
radioactivity	☢️ radioactive element
half-life	20,47 ± 0,03 d
spin	7/2
nuclear quadrupole moment	6,7 ± 0,8
dema îcadkirinê yan keşfê	1954
parity	+

decay mode	intensity
α (α emission)	100%
SF (spontaneous fission)	8.7%

²⁵⁴Es

Hejmara baristeyî	254
neutron number	155
Giraniya Atomê	254,088024337 ± 0,000003152 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	275,7 ± 0,5 d
spin	7
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1954
parity	+

decay mode	intensity
α (α emission)	100%
ϵ (electron capture)
β⁻ (β⁻ decay)	1.74%
SF (spontaneous fission)	3%

²⁵⁵Es

Hejmara baristeyî	255
neutron number	156
Giraniya Atomê	255,090273504 ± 0,000011612 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	39,8 ± 1,2 d
spin	7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1954
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	92%
α (α emission)	8%
SF (spontaneous fission)	0.0041%

²⁵⁶Es

Hejmara baristeyî	256
neutron number	157
Giraniya Atomê	256,093597 ± 0,000107 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	7,6 h
spin	7
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1976
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)	0.002%

²⁵⁷Es

Hejmara baristeyî	257
neutron number	158
Giraniya Atomê	257,095979 ± 0,000441 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	7,7 ± 0,2 d
spin	7/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê	1987
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
α (α emission)

²⁵⁸Es

Hejmara baristeyî	258
neutron number	159
Giraniya Atomê	258,09952 ± 0,00043 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin
nuclear quadrupole moment
dema îcadkirinê yan keşfê
parity

decay mode	intensity
β⁻ (β⁻ decay)
α (α emission)

dîrok

kaşîf an îcadker	Argonne, Los Alamos, U of Calif
location of discovery	United States
dema îcadkirinê yan keşfê	1952
Bêjenasî	Named in honor of the scientist Albert Einstein.
pronunciation	ine-STINE-i-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

Einsteiniyûm on ChemicalAid

einsteinium

Einsteiniyûm (Es)

Physical Property

Chemical Property

other

Isotopes of Einsteinium

239Es

240Es

241Es

242Es

243Es

244Es

245Es

246Es

247Es

248Es

249Es

250Es

251Es

252Es

253Es

254Es

255Es

256Es

257Es

258Es

dîrok

source

Nuclear Screening Constants

²³⁹Es

²⁴⁰Es

²⁴¹Es

²⁴²Es

²⁴³Es

²⁴⁴Es

²⁴⁵Es

²⁴⁶Es

²⁴⁷Es

²⁴⁸Es

²⁴⁹Es

²⁵⁰Es

²⁵¹Es

²⁵²Es

²⁵³Es

²⁵⁴Es

²⁵⁵Es

²⁵⁶Es

²⁵⁷Es

²⁵⁸Es