`Na^(+)` has completely filled K and L shells. Explain.

Cl^(-) has completely filled K and L shells. Explain.

Cl-has completely filled K, & L shells. Explain

Cl-has completely filled K, L & M shells. Explain it based on Bhor-Bury theory. (AS_(1))

Completely filled shells in actinides are

In the Modern Periodic Table, which group has a completely filled valence shell and chemically inactive elements?

Completely filled shells in lanthanides are