Pentseptseptium (Pss)
Pentseptseptium is the systematic name of the theoretical 577वाँ element in the periodic table with a symbol of Pss and atomic number of 577. Pentseptseptium, also known as element 577, has पाँच सौ सतहत्तर protons in its nucleus, and पाँच सौ सतहत्तर electrons in its shells.