Pentseptseptium (Pss)

Pentseptseptium is the systematic name of the theoretical 577º element in the periodic table with a symbol of Pss and atomic number of 577. Pentseptseptium, also known as element 577, has cinque­cento­settanta­sette protons in its nucleus, and cinque­cento­settanta­sette electrons in its shells.