Ајнштајниум

99
Es
Група
Нема одговор
Периода
7
блок
f
Protons
Electrons
Neutrons
99
99
153
Општи Својства
Атомски број
99
Атомска тежина
[252]
Mass Number
252
Category
Актиноид
Color
Нема одговор
Radioactive
Да
Named after Albert Einstein
Кристална структура
Нема одговор
History
Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952.

It was identified by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.

The new element was produced by the nuclear explosion in miniscule amounts by the addition of 15 neutrons to uranium-238.
Electrons per shell
2, 8, 18, 32, 29, 8, 2
Електронска конфигурација
[Rn] 5f11 7s2
Es
Einsteinium is the first divalent metal in the actinide series
Физички Својства
Фаза
Solid
Густина
8,84 g/cm3
Точка на топење
1133,15 K | 860 °C | 1580 °F
Точка на вриење
-
Топлина на топење
Нема одговор
Топлина на испарување
Нема одговор
Specific Heat Capacity
-
Abundance in Earth's crust
Нема одговор
Abundance in Universe
Нема одговор
Einsteinium
Кредити на слика: Wikimedia Commons (National Nuclear Security Administration)
Einsteinium was first observed in the fallout from the Ivy Mike nuclear test
CAS Number
7429-92-7
PubChem CID Number
Нема одговор
Атомски Својства
Атомски полупречник
-
Ковалентен полупречник
-
Електронегативност
1,3 (Полингова скала)
Ionization Potential
6,42 eV
Atomic Volume
28,5 cm3/mol
Thermal Conductivity
0,1 W/cm·K
Oxidation States
2, 3
Applications
Einsteinium is mainly used for scientific research purposes.

The rare isotope einsteinium-254 is favored for production of ultraheavy elements.

Einsteinium-254 was used as the calibration marker in the chemical analysis spectrometer of the Surveyor 5 lunar probe.
Einsteinium is harmful due to its radioactivity
Isotopes
Stable Isotopes
-
Unstable Isotopes
240Es, 241Es, 242Es, 243Es, 244Es, 245Es, 246Es, 247Es, 248Es, 249Es, 250Es, 251Es, 252Es, 253Es, 254Es, 255Es, 256Es, 257Es, 258Es