Which of the following elements has completely filled outermost shells?
Neon (Ne)
Argon (Ar)
Xenon (Xe)
Lithium
Neon (Ne), argon (Ar), and xenon (Xe) have filled outermost shells.
Atoms are said to be completely filled when all the available shells are completely filled with electrons. Which of the following elements has completely filled outermost shell in its atoms?