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 յոթ­հարյուր քսան­ինը protons in its nucleus, and յոթ­հարյուր քսան­ինը electrons in its shells.