Septtrihexium (Sth)
Septtrihexium is the systematic name of the theoretical 736ú element in the periodic table with a symbol of Sth and atomic number of 736. Septtrihexium, also known as element 736, has seacht gcéad tríocha a sé protons in its nucleus, and seacht gcéad tríocha a sé electrons in its shells.