Pentunseptium (Pus)

Pentunseptium is the systematic name of the theoretical 517. element in the periodic table with a symbol of Pus and atomic number of 517. Pentunseptium, also known as element 517, has πεντακόσια δεκα­επτά protons in its nucleus, and πεντακόσια δεκα­επτά electrons in its shells.