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Beryllium (Be)
Atomic number: 4 · Category: alkaline earth metal · Group 2 · Period 2 · Phase: Solid
Beryllium is a chemical element with symbol Be and atomic number 4. It is created through stellar nucleosynthesis and is a relatively rare element in the universe. It is a divalent element which occurs naturally only in combination with other elements in minerals.
Atomic mass: 9.01218315
Density: 1.85
Melting point: 1560 K
Boiling point: 2742 K
Appearance: white-gray metallic
Source: Wikipedia
Block: s
Molar heat: 16.443
CPK color:#c2ff00
Electronic structure
Electron configuration: 1s2 2s2
Configuration (semantic): [He] 2s2
Shells: 2, 2
Electronegativity (Pauling): 1.57
Electron affinity: -48
Ionization energies: 899.5, 1757.1, 14848.7, 21006.6
Periodic position
Group: 2
Period: 2
xpos: 2
ypos: 2
Spectral/Bohr images
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3D Model