<small>[[Chemistry]] | [[19th Century]]</small> | | | |---|---| |Atomic Mass|[144.24 u](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Atomic-Weight)| |Standard State|[solid](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Physical-Description)| |Electron Configuration|[[Xe]6s24f4](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Electron-Configuration)| |Oxidation States|[+3](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Oxidation-States)| |Electronegativity (Pauling Scale)|[1.14](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Electronegativity)| |Atomic Radius (van der Waals)|[229 pm](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Atomic-Radius)| |Ionization Energy|[5.525 eV](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Ionization-Energy)| |Melting Point|[1294 K](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Melting-Point)| |Boiling Point|[3347 K](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Boiling-Point)| |Density|[7.01 g/cm³](https://pubchem.ncbi.nlm.nih.gov/element/60#section=Density)| |Year Discovered|[1885](https://pubchem.ncbi.nlm.nih.gov/element/60#section=History)|