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