Predefinição:Elemento/Berílio

Berílio
LítioBerílioBoro
 
 
4
Be
 
               
               
                                   
                                   
                                                               
                                                               
Be
Na
Tabela completaTabela estendida
Aparência
cinza metálico


Fragmento grande de berílio de 99% de pureza de cerca de 140 g.
Informações gerais
Nome, símbolo, número Berílio, Be, 4
Série química metal alcalinoterroso
Grupo, período, bloco 2 (IIA), 2, s
Densidade, dureza 1848 kg/m3, 5,5
Número CAS 7440-41-7
Número EINECS
Propriedade atómicas
Massa atómica 9,012182(3) u
Raio atómico (calculado) 105 (112) pm
Raio covalente 90 pm
Raio de Van der Waals 153 pm
Configuração electrónica 1s2 2 s2
Elétrons (por nível de energia) 2, 2 (ver imagem)
Estado(s) de oxidação +2, +1 (óxido anfótero)
Óxido
Estrutura cristalina hexagonal
Propriedades físicas
Estado da matéria sólido
Ponto de fusão 1560 K
Ponto de ebulição 2744 K
Entalpia de fusão 12,20 kJ/mol
Entalpia de vaporização 292,40 kJ/mol
Temperatura crítica  K
Pressão crítica  Pa
Volume molar 4,85×10-6 m3/mol
Pressão de vapor 1 Pa a 1462 K
Velocidade do som 13000 m/s a 20 °C
Classe magnética diamagnético
Susceptibilidade magnética
Permeabilidade magnética
Temperatura de Curie  K
Diversos
Eletronegatividade (Pauling) 1,57
Calor específico 1825 J/(kg·K)
Condutividade elétrica S/m
Condutividade térmica 201 W/(m·K)
1.º Potencial de ionização 899,5 kJ/mol
2.º Potencial de ionização 1757,1 kJ/mol
3.º Potencial de ionização 14848,7 kJ/mol
4.º Potencial de ionização {{{potencial_ionização4}}} kJ/mol
5.º Potencial de ionização {{{potencial_ionização5}}} kJ/mol
6.º Potencial de ionização {{{potencial_ionização6}}} kJ/mol
7.º Potencial de ionização {{{potencial_ionização7}}} kJ/mol
8.º Potencial de ionização {{{potencial_ionização8}}} kJ/mol
9.º Potencial de ionização {{{potencial_ionização9}}} kJ/mol
10.º Potencial de ionização {{{potencial_ionização10}}} kJ/mol
Isótopos mais estáveis
iso AN Meia-vida MD Ed PD
MeV
7Betraços53,12 dε0,8626Li
9Be100%estável com 5 neutrões
10Betraços1,51×106 aß-0,55610B
Unidades do SI & CNTP, salvo indicação contrária.

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