Pentseptoctium (Pso)
Pentseptoctium is the systematic name of the theoretical 578. element in the periodic table with a symbol of Pso and atomic number of 578. Pentseptoctium, also known as element 578, has penki šimtai septyniasdešimt aštuoni protons in its nucleus, and penki šimtai septyniasdešimt aštuoni electrons in its shells.