Pentquadbium (Pqb)
Pentquadbium is the systematic name of the theoretical ۵۴۲. element in the periodic table with a symbol of Pqb and atomic number of 542. Pentquadbium, also known as element 542, has پانصد و چهل و دو protons in its nucleus, and پانصد و چهل و دو electrons in its shells.