Penttrioctium (Pto)

Penttrioctium is the systematic name of the theoretical 538. element in the periodic table with a symbol of Pto and atomic number of 538. Penttrioctium, also known as element 538, has fimm­hundrað­og­tríati­átta protons in its nucleus, and fimm­hundrað­og­tríati­átta electrons in its shells.