Es - Einsteinium

There is no einsteinium in our lab.

Atomic number - 99 Density g/mL -

Atomic weight u 252 Melting point K -

Bonding radius A - Boiling point K -

Atomic radius A - Heat of vaporization kJ/mol -

Ionization Potential V 6 .42 Heat of fusion kJ/mol -

Electronegativity - 1 .3 Specific heat J/gK -

The oxide is unknown.
Crystal are unknown.

Electron config. : [Rn] 5f¹¹ 7s²

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Es: Click mass number for decay process, product for element page.

242
7 sec
EC/ECF,5.600
Cf-242/?
242.06967 243
21 sec
a/EC,4.000
Bk-239/Cf-243
243.06967 244
37 sec
a/EC,4.560
Bk-240/Cf-244
244.07088 245
1.1 min
a/EC,3.050
Bk-241/Cf-245
245.07131 246
7.7 min
a/EC,3.880
Bk-242/Cf-246
246.07295 247
4.55 min
a/EC,2.480
Bk-243/Cf-247
247.07364 248
27 min
a/EC,3.060
Bk-244/Cf-248
248.07545

249
102.2 min
a/EC,1.450
Bk-245/Cf-249
249.07640 250
8.6 hr
a/EC,2.100
Bk-246/Cf-250
250.07864 251
33 hr
a/EC,6.176
Bk-247/Cf-251
251.07998 252
471.7 da
a/B-/EC,6.760
Bk-248/Fm-252/Cf-252
252.08297 253
20.47 da
a/SF,6.739
Bk-249/?
253.08481 254
275.7 da
a/B-/EC/SF,6.618
Bk-250/Fm-254/Cf-254/?
254.08801 255
39.8 da
a/B-/SF,5.200
Bk-251/Fm-255/?
255.09026

256
25.4 min
B-,1.670 MeV
Fm-256
256.09355 257
2 sec
SF,4.190 MeV
?
257.09597 MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

Atomic number	-	99		Density	g/mL	-
Atomic weight	u	252		Melting point	K	-
Bonding radius	A	-		Boiling point	K	-
Atomic radius	A	-		Heat of vaporization	kJ/mol	-
Ionization Potential	V	6	.42	Heat of fusion	kJ/mol	-
Electronegativity	-	1	.3	Specific heat	J/gK	-
The oxide is unknown.				Crystal are unknown.
Electron config. : [Rn] 5f¹¹ 7s²
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242 7 sec EC/ECF,5.600 Cf-242/? 242.06967	243 21 sec a/EC,4.000 Bk-239/Cf-243 243.06967	244 37 sec a/EC,4.560 Bk-240/Cf-244 244.07088	245 1.1 min a/EC,3.050 Bk-241/Cf-245 245.07131	246 7.7 min a/EC,3.880 Bk-242/Cf-246 246.07295	247 4.55 min a/EC,2.480 Bk-243/Cf-247 247.07364	248 27 min a/EC,3.060 Bk-244/Cf-248 248.07545
249 102.2 min a/EC,1.450 Bk-245/Cf-249 249.07640	250 8.6 hr a/EC,2.100 Bk-246/Cf-250 250.07864	251 33 hr a/EC,6.176 Bk-247/Cf-251 251.07998	252 471.7 da a/B-/EC,6.760 Bk-248/Fm-252/Cf-252 252.08297	253 20.47 da a/SF,6.739 Bk-249/? 253.08481	254 275.7 da a/B-/EC/SF,6.618 Bk-250/Fm-254/Cf-254/? 254.08801	255 39.8 da a/B-/SF,5.200 Bk-251/Fm-255/? 255.09026
256 25.4 min B-,1.670 MeV Fm-256 256.09355	257 2 sec SF,4.190 MeV ? 257.09597	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass