Septbiennium (Sbe)

Septbiennium is the systematic name of the theoretical 729. element in the periodic table with a symbol of Sbe and atomic number of 729. Septbiennium, also known as element 729, has שבע מאות עשרים ותשע protons in its nucleus, and שבע מאות עשרים ותשע electrons in its shells.