Unennennium is the systematic name of the theoretical 199. element in the periodic table with a symbol of Uee and atomic number of 199. Unennennium, also known as element 199, has நூறு தொண்ணூறு ஒன்பது protons in its nucleus, and நூறு தொண்ணூறு ஒன்பது electrons in its shells.