Attribute | Bromine × | Astatine × |
---|---|---|
Atomic mass (u) | 79.9 | 209.98715 |
Standard state | Liquid | Solid |
1↑Oxidation states |
|
|
Electron configuration | [Ar]4s²3d¹⁰4p⁵ | [Xe]6s²4f¹⁴5d¹⁰6p⁵ |
Atomic radius (van der waals) (pm) | 183 | 202 |
Electronegativity (pauling scale) | 2.96 | 2.2 |
Electron affinity (eV) | 3.365 | 2.8 |
Ionization energy (eV) | 11.814 | 9.5 |
Boiling point (K) | 331.95 | - |
Melting point (K) | 265.95 | 575 |
Density (g/cm³) | 3.11 | 7 |
Atomic number | 35 | 85 |
Group name | Halogen | Halogen |
Symbol | Br | At |
Discovered (year) | 1826 | 1940 |