Pentseptseptium (Pss)
Pentseptseptium is the systematic name of the theoretical 577'инчи element in the periodic table with a symbol of Pss and atomic number of 577. Pentseptseptium, also known as element 577, has беш жүз жетимиш жети protons in its nucleus, and беш жүз жетимиш жети electrons in its shells.