Pentsepttrium (Pst)
Pentsepttrium is the systematic name of the theoretical 573. element in the periodic table with a symbol of Pst and atomic number of 573. Pentsepttrium, also known as element 573, has fënnefhonnertdräiansiwwenzeg protons in its nucleus, and fënnefhonnertdräiansiwwenzeg electrons in its shells.