Einsténio
99
Es
Grupo
n/a
Período
7
Bloco
f
Prótons
Elétrons
Nêutrons
99
99
153
Propriedades Gerais
Número atómico
99
Massa atómica relativa
[252]
Número de massa
252
Categoria
Actinóides
Cor
n/a
Radioativo
Sim
Nomeado com relação a Albert Einstein
Estrutura cristalina
n/a
História
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.
Elétrons por nível
2, 8, 18, 32, 29, 8, 2
Configuração eletrônica
[Rn] 5f11 7s2
O Einsténio é o primeiro metal bivalente, do grupo dos actinídeos
Propriedades Físicas
Estado da matéria
Sólido
Densidade
8,84 g/cm3
Ponto de fusão
1133,15 K | 860 °C | 1580 °F
Ponto de ebulição
-
Entalpia de fusão
n/a
Entalpia de vaporização
n/a
Calor específico
-
Abundância na Crosta Terrestre
n/a
Abundância no Universo
n/a
Créditos de Imagem: Wikimedia Commons (National Nuclear Security Administration)
Einsteinium was first observed in the fallout from the Ivy Mike nuclear test
Número CAS
7429-92-7
Número CID do PubChem
n/a
Propriedades Atómicas
Raio atómico
-
Raio covalente
-
Eletronegatividade
1,3 (Escala de Pauling)
Potencial de ionização
6,42 eV
Volume atômico
28,5 cm3/mol
Condutividade térmica
0,1 W/cm·K
Estados de oxidação
2, 3
Aplicações
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.
O einstéinio é nocivo, devido à sua radioatividade
Isótopos
Isótopos Estáveis
-Isótopos Instáveis
240Es, 241Es, 242Es, 243Es, 244Es, 245Es, 246Es, 247Es, 248Es, 249Es, 250Es, 251Es, 252Es, 253Es, 254Es, 255Es, 256Es, 257Es, 258Es