Penttriennium (Pte)
Penttriennium is the systematic name of the theoretical 539. element in the periodic table with a symbol of Pte and atomic number of 539. Penttriennium, also known as element 539, has penki šimtai trisdešimt devyni protons in its nucleus, and penki šimtai trisdešimt devyni electrons in its shells.