Pentseptseptium (Pss)
Pentseptseptium is the systematic name of the theoretical 577'inci element in the periodic table with a symbol of Pss and atomic number of 577. Pentseptseptium, also known as element 577, has beş yüz yetmiş yeddi protons in its nucleus, and beş yüz yetmiş yeddi electrons in its shells.