Ennsepttrium (Est)

Ennsepttrium is the systematic name of the theoretical 973e element in the periodic table with a symbol of Est and atomic number of 973. Ennsepttrium, also known as element 973, has negen­honderd­drie­ën­zeventig protons in its nucleus, and negen­honderd­drie­ën­zeventig electrons in its shells.