Pentseptoctium (Pso)

Pentseptoctium is the systematic name of the theoretical 578e element in the periodic table with a symbol of Pso and atomic number of 578. Pentseptoctium, also known as element 578, has vijf­honderd­acht­en­zeventig protons in its nucleus, and vijf­honderd­acht­en­zeventig electrons in its shells.