Sr: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2
1s2 | |
2s2 | | 2p6 | | | | | |
3s2 | | 3p6 | | | | | | 3d10 | | | | | | | | | |
4s2 | | 4p6 | | | | | |
5s2 | |
Kr: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6
1s2 | |
2s2 | | 2p6 | | | | | |
3s2 | | 3p6 | | | | | | 3d10 | | | | | | | | | |
4s2 | | 4p6 | | | | | |