Éinstéiniam (Es)

chemical element with the atomic number of 99

Atomic Number	99
Atomic Weight	252
Núicléónuimhir	239

Group
Period	7
Block	f

prótón	99 p⁺
neodrón	140 n⁰
leictreon	99 e^-

Animated Samhail Bohr of Es (Éinstéiniam)

Physical Property

Ga Adamhach
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
dlús	8.84 g/cm³

Chemical Property

{ERROR}

fuinneamh

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
eantalpacht chaighdeánach an fhoirmithe	133 kJ/mol
leictreon

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

Fiúsleictreon	2 ⓘ

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

Staid ocsaídiúcháine	2, 3, 4
Leictridhiúltacht	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
dath	Black #ffffff #b31fd4 #b31fd4
appearance	silver-colored
Comhéifeacht athraonta
thermodynamic material property
Thermal Conductivity
Forbairt theirmeach
molar heat capacity
Specific Heat Capacity
Cóimheas saintoilleadh teasa
electrical properties
type
electrical conductivity
Friotachas
Forsheoltacht
Maighnéadas
type
So-ghabhálacht mhaighnéadach (Mass)
So-ghabhálacht mhaighnéadach (Molar)
So-ghabhálacht mhaighnéadach (Volume)
magnetic ordering
Teocht Curie
Néel temperature
struchtúr
Crystal Structure	{ERROR}
lattice constant
Lattice Angles
airíonna meicniúla
Cruas
Modal toirte
modal fiartha
modal Young
Cóimheas Poisson
luas forleata fuaime
aicmiúchán
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	43
Mendeleev Number	34
Pettifor Number	38
Geochemical Class
Goldschmidt classification	synthetic

eile

Gas Basicity
polarizability	118 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Crosghearradh	160
Neutron Mass Absorption
Uimhir chandamach	5I15/2
space group	()

Isotopes of Einsteinium

Stable Isotopes	0
Unstable Isotopes	20
Natural Isotopes	0

²³⁹Es

Núicléónuimhir	239
neutron number	140
Mais Adamhach Choibhneasta	239.06831 ± 0.000322 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht	-

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

²⁴⁰Es

Núicléónuimhir	240
neutron number	141
Mais Adamhach Choibhneasta	240.068949 ± 0.000393 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	6 ± 1.7 s
Guairne	4
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2017
Paireacht	-

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

²⁴¹Es

Núicléónuimhir	241
neutron number	142
Mais Adamhach Choibhneasta	241.068592 ± 0.000248 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	5.1 ± 0.8 s
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1996
Paireacht	-

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

²⁴²Es

Núicléónuimhir	242
neutron number	143
Mais Adamhach Choibhneasta	242.069567 ± 0.000276 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	17.8 ± 1.6 s
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1994
Paireacht	+

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

²⁴³Es

Núicléónuimhir	243
neutron number	144
Mais Adamhach Choibhneasta	243.069508 ± 0.000222 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	22.1 ± 1.4 s
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1973
Paireacht	+

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

²⁴⁴Es

Núicléónuimhir	244
neutron number	145
Mais Adamhach Choibhneasta	244.070881 ± 0.000195 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	37 ± 4 s
Guairne	6
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1973
Paireacht	+

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

²⁴⁵Es

Núicléónuimhir	245
neutron number	146
Mais Adamhach Choibhneasta	245.071192 ± 0.000178 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.11 ± 0.06 m
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1967
Paireacht	-

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

²⁴⁶Es

Núicléónuimhir	246
neutron number	147
Mais Adamhach Choibhneasta	246.072806474 ± 0.000096538 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7.5 ± 0.5 m
Guairne	4
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1954
Paireacht	-

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

²⁴⁷Es

Núicléónuimhir	247
neutron number	148
Mais Adamhach Choibhneasta	247.073621929 ± 0.00002087 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	4.55 ± 0.26 m
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1967
Paireacht	+

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

²⁴⁸Es

Núicléónuimhir	248
neutron number	149
Mais Adamhach Choibhneasta	248.075469 ± 0.000056 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	24 ± 3 m
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1956
Paireacht	-

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

²⁴⁹Es

Núicléónuimhir	249
neutron number	150
Mais Adamhach Choibhneasta	249.076409 ± 0.000032 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	102.2 ± 0.6 m
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1956
Paireacht	+

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

²⁵⁰Es

Núicléónuimhir	250
neutron number	151
Mais Adamhach Choibhneasta	250.078611 ± 0.000107 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	8.6 ± 0.1 h
Guairne	6
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1956
Paireacht

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

²⁵¹Es

Núicléónuimhir	251
neutron number	152
Mais Adamhach Choibhneasta	251.079991431 ± 0.000005676 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	33 ± 1 h
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1956
Paireacht	-

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

²⁵²Es

Núicléónuimhir	252
neutron number	153
Mais Adamhach Choibhneasta	252.082979173 ± 0.000053736 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	471.7 ± 1.9 d
Guairne	4
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1956
Paireacht	+

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

²⁵³Es

Núicléónuimhir	253
neutron number	154
Mais Adamhach Choibhneasta	253.084821241 ± 0.000001341 Da
G-fhachtóir	1.1714285714286 ± 0.02
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	20.47 ± 0.03 d
Guairne	7/2
nuclear quadrupole moment	6.7 ± 0.8
dáta fionnachtana nó tionscnaimh	1954
Paireacht	+

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

²⁵⁴Es

Núicléónuimhir	254
neutron number	155
Mais Adamhach Choibhneasta	254.088024337 ± 0.000003152 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	275.7 ± 0.5 d
Guairne	7
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1954
Paireacht	+

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

²⁵⁵Es

Núicléónuimhir	255
neutron number	156
Mais Adamhach Choibhneasta	255.090273504 ± 0.000011612 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	39.8 ± 1.2 d
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1954
Paireacht	+

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

²⁵⁶Es

Núicléónuimhir	256
neutron number	157
Mais Adamhach Choibhneasta	256.093597 ± 0.000107 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7.6 h
Guairne	7
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1976
Paireacht	+

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

²⁵⁷Es

Núicléónuimhir	257
neutron number	158
Mais Adamhach Choibhneasta	257.095979 ± 0.000441 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7.7 ± 0.2 d
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1987
Paireacht	+

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

²⁵⁸Es

Núicléónuimhir	258
neutron number	159
Mais Adamhach Choibhneasta	258.09952 ± 0.00043 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht

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

stair

fionnachtaí nó aireagóir	Argonne, Los Alamos, U of Calif
áit ar tháinig air/uirthi	United States
dáta fionnachtana nó tionscnaimh	1952
Sanasaíocht	Named in honor of the scientist Albert Einstein.
pronunciation	ine-STINE-i-em (Béarla)

foinse

Abundance
Abundance in Earth's crust
natural abundance (aigéan)
natural abundance (corp an duine)	0 %
natural abundance (dreigeoideach)	0 %
natural abundance (An Ghrian)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Éinstéiniam on ChemicalAid

Éinstéiniam (Es)

Physical Property

Chemical Property

eile

Isotopes of Einsteinium

239Es

240Es

241Es

242Es

243Es

244Es

245Es

246Es

247Es

248Es

249Es

250Es

251Es

252Es

253Es

254Es

255Es

256Es

257Es

258Es

stair

foinse

Nuclear Screening Constants

²³⁹Es

²⁴⁰Es

²⁴¹Es

²⁴²Es

²⁴³Es

²⁴⁴Es

²⁴⁵Es

²⁴⁶Es

²⁴⁷Es

²⁴⁸Es

²⁴⁹Es

²⁵⁰Es

²⁵¹Es

²⁵²Es

²⁵³Es

²⁵⁴Es

²⁵⁵Es

²⁵⁶Es

²⁵⁷Es

²⁵⁸Es