Pentseptseptium (Pss)
Pentseptseptium is the systematic name of the theoretical ke-577 element in the periodic table with a symbol of Pss and atomic number of 577. Pentseptseptium, also known as element 577, has lima ratus tujuh puluh tujuh protons in its nucleus, and lima ratus tujuh puluh tujuh electrons in its shells.