Septquadennium (Sqe)

Septquadennium is the systematic name of the theoretical 749e element in the periodic table with a symbol of Sqe and atomic number of 749. Septquadennium, also known as element 749, has zeven­honderd­negen­en­veertig protons in its nucleus, and zeven­honderd­negen­en­veertig electrons in its shells.