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 петсто седумдесет и седум protons in its nucleus, and петсто седумдесет и седум electrons in its shells.