Ajnštajnij
99
Es
Skupina
n/a
Perioda
7
Blok
f
Protons
Electrons
Neutrons
99
99
153
General Properties
Vrstno število
99
Atomska teža
[252]
Mass Number
252
Kategorija
Aktinoidi
Barva
n/a
Radioactive
Da
Named after Albert Einstein
Kristalna struktura
n/a
Zgodovina
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.
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
Razporeditev elektronov
[Rn] 5f11 7s2
Einsteinium is the first divalent metal in the actinide series
Physical Properties
Faza snovi
Trdnina
Gostota
8,84 g/cm3
Tališče
1133,15 K | 860 °C | 1580 °F
Vrelišče
-
Talilna toplota
n/a
Izparilna toplota
n/a
Toplotna kapaciteta
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Zasluge za slike: 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
n/a
Atomic Properties
Atomski polmer
-
Kovalentni polmer
-
Elektronegativnost
1,3 (Paulingova lestvica)
Ionization Potential
6,42 eV
Atomic Volume
28,5 cm3/mol
Toplotna prevodnost
0,1 W/cm·K
Oksidacijska stanja
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.
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