<small>[[Chemistry]] | [[19th Century]]</small> | | | |---|---| |Atomic Mass|[79.90 u](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Atomic-Weight)| |Standard State|[liquid](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Physical-Description)| |Electron Configuration|[[Ar]4s23d104p5](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Electron-Configuration)| |Oxidation States|[+5, +1, -1](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Oxidation-States)| |Electronegativity (Pauling Scale)|[2.96](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Electronegativity)| |Atomic Radius (van der Waals)|[183 pm](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Atomic-Radius)| |Ionization Energy|[11.814 eV](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Ionization-Energy)| |Electron Affinity|[3.365 eV](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Electron-Affinity)| |Melting Point|[265.95 K](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Melting-Point)| |Boiling Point|[331.95 K](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Boiling-Point)| |Density|[3.11 g/cm³](https://pubchem.ncbi.nlm.nih.gov/element/35#section=Density)| |Year Discovered|[1826](https://pubchem.ncbi.nlm.nih.gov/element/35#section=History)|