Ответы.
1) n = 1, l = 0 (1s); n = 2, l = 0, l = 1 (2s, 2p).
Одинакова.
2) n = 1, l = 0 (1s); n = 2, l = 0, l = 1 (2s, 2p); n = 3, l = 0, l = 1, l = 2 (3s, 3p, 3d).
Различна.
3) n = 1, l = 0 (1s); n = 2, l = 0, l = 1 (2s, 2p); n = 3, l = 0, l = 1, l = 2 (3s, 3p, 3d);
n = 4, l = 0, l = 1, l = 2, l = 3 (4s, 4p, 4d, 4f).