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Unbinilium

Chemical element
Unbinilium, also known as eka-radium or element 120, is a hypothetical chemical element; it has symbol Ubn and atomic number 120. Unbinilium and Ubn are the temporary systematic IUPAC name and symbol, which are used until the element is... Wikipedia
Symbol: Ubn
Atomic number: 120
Electronegativity: Pauling scale: 0.91 (predicted)
Chemical series: Period 8 element
Electrons: Unbinilium atoms
Block: s-block
Covalent radius: 206–210 pm (extrapolated)