Septquadennium (Sqe)

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