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Boron (B)
Atomic number: 5 · Category: metalloid · Group 13 · Period 2 · Phase: Solid
Boron is a metalloid chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in both the Solar system and the Earth's crust. Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals.
Atomic mass: 10.81
Density: 2.08
Melting point: 2349 K
Boiling point: 4200 K
Appearance: black-brown
Source: Wikipedia
Block: p
Molar heat: 11.087
CPK color:#ffb5b5
Electronic structure
Electron configuration: 1s2 2s2 2p1
Configuration (semantic): [He] 2s2 2p1
Shells: 2, 3
Electronegativity (Pauling): 2.04
Electron affinity: 26.989
Ionization energies: 800.6, 2427.1, 3659.7, 25025.8, 32826.7
Periodic position
Group: 13
Period: 2
xpos: 13
ypos: 2
Spectral/Bohr images
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3D Model