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 fimm­hundrað­og­seytan protons in its nucleus, and fimm­hundrað­og­seytan electrons in its shells.