Silicon |
Symbol | Si |
---|---|
Latin name | Silicium |
Atomic number | 14 |
Period | 3 |
Element category | Metalloids |
Relative atomic mass | 28.0855 |
Group | IV.A |
Electronegativity | 1.8 |
Oxidation numbers | -4, 4 |
Electron configuration | 1s2 2s2 2p6 3s2 3p2 |
Density [g/cm3] | 2.332 |
State | Solid |
Melting point [°C] | 1410 |
Boiling point [°C] | 2355 |
Atomic radius [pm] | 111 |
Covalent radius [pm] | 111 |
Thermal conductivity [W m-1K-1] | 148 |
Heat capacity [J K-1g-1] | 0.70 |
Discovery | 1824 |
Hardness [Mohs scale] | 7.0 |
Young's modulus [GPa] | 47 |
Electrical conductivity [S m-1] | 4 · 102 |
1.st ionization energy [eV] | 8.1517 |
2.nd ionization energy [eV] | 16.345 |
3.rd ionization energy [eV] | 33.492 |
Stable isotopes | 3 |
Unstable isotopes | 5 |