The 4f level is successively filled up in

The 4 F level is successively filled up in

Tile 4f-subshell is successively filled for

When 4f level is completely filled with electrons, the next electron will enter into a subshell whose (n+1) is equal to -

The elements in which 4f orbitals are progressively filled up are called

Fill ups

Can we say that there is progressive increase in energy level in successive trophic levels ?

The elements in which 4f orbitals are progressively field up are called as