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e- terakhir = n : 2, l : 1, m : +1, s : + 1/2
11 = 1s^2 2s^2 2p^6 3s^1
e- terakhir = n : 3, l : 0, m : 0, s : + 1/2
14 = 1s^2 2s^2 2p^6 3s^2 3p^2
e- terakhir = n : 3, l : 1, m : 0, s : + 1/2
17 = 1s^2 2s^2 2p^6 3s^2 3p^5
e- terakhir = n : 3, l : 1, m : 0, s : -1/2