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 septyni šimtai dvidešimt devyni protons in its nucleus, and septyni šimtai dvidešimt devyni electrons in its shells.