Pentseptseptium (Pss)

Pentseptseptium is the systematic name of the theoretical 577:e element in the periodic table with a symbol of Pss and atomic number of 577. Pentseptseptium, also known as element 577, has fem­hundra­sjuttio­sju protons in its nucleus, and fem­hundra­sjuttio­sju electrons in its shells.