Arsenic |
Symbol | As |
---|---|
Latin name | Arsenicum |
Atomic number | 33 |
Period | 4 |
Element category | Metalloids |
Relative atomic mass | 74.92159 |
Group | V.A |
Electronegativity | 2.0 |
Oxidation numbers | -3, 3, 5 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3 |
Density [g/cm3] | 4.7 |
State | Solid |
Melting point [°C] | 817 |
Boiling point [°C] | 613 |
Atomic radius [pm] | 114 |
Covalent radius [pm] | 119 |
Thermal conductivity [W m-1K-1] | 50 |
Heat capacity [J K-1g-1] | 0.33 |
Discovery | 1250 |
Hardness [Mohs scale] | 3.5 |
Brinell hardness [MPa] | 1440 |
Young's modulus [GPa] | 8 |
Electrical conductivity [S m-1] | 3.3 · 106 |
1.st ionization energy [eV] | 9.8152 |
2.nd ionization energy [eV] | 18.633 |
3.rd ionization energy [eV] | 28.351 |
Stable isotopes | 1 |
Unstable isotopes | 13 |