atom_number      22   22.0
electron_config  10   srel  restricted
    1s   2.0   1
    2s   2.0   1
    2p   6.0   1
    3s   2.0   1
    3p   6.0   1
    3d   2.0   1
    4s   2.0   1
    4p   0.0   0
    4d   0.0   0
    4f   0.0   0

