Einsteinium

99
Es
Golongan
n/a
Periode
7
Blok
f
Proton
Elektron
Neutron
99
99
153
Sifat Umum
Nomor atom
99
Massa atom
[252]
Nomor massa
252
Kategori
Aktinida
Warna
n/a
Radioaktif
Ya
Named after Albert Einstein
Struktur kristal
n/a
Sejarah
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.
Elektron per kulit
2, 8, 18, 32, 29, 8, 2
Konfigurasi elektron
[Rn] 5f11 7s2
Es
Einsteinium is the first divalent metal in the actinide series
Sifat Fisika
Fase
Solid
Kepadatan
8,84 g/cm3
Titik lebur
1133,15 K | 860 °C | 1580 °F
Titik didih
-
Kalor peleburan
n/a
Kalor penguapan
n/a
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
Einsteinium
Kredit Gambar: Wikimedia Commons (National Nuclear Security Administration)
Einsteinium was first observed in the fallout from the Ivy Mike nuclear test
Nomor CAS
7429-92-7
PubChem CID Number
n/a
Sifat Atom
Jari-jari atom
-
Jari-jari kovalen
-
Elektronegativitas
1,3 (Skala Pauling)
Potensi Ionisasi
6,42 eV
Volume atom
28,5 cm3/mol
Kondusivitas termal
0,1 W/cm·K
Bilangan oksidasi
2, 3
Aplikasi
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
Isotop
Isotop stabil
-
Isotop tidak stabil
240Es, 241Es, 242Es, 243Es, 244Es, 245Es, 246Es, 247Es, 248Es, 249Es, 250Es, 251Es, 252Es, 253Es, 254Es, 255Es, 256Es, 257Es, 258Es