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Wasserstoff: 1s. Helium: 1s 2. Lithium: [He]2s. Beryllium: [He]2s 2. Bor: [He]2s 2 2p. Kohlenstoff: [He]2s 2 2p 2. Stickstoff: [He]2s 2 2p 3. Sauerstoff: [He]2s 2 2p 4. Fluor: [He]2s 2 2p 5. Neon: [He]2s 2 2p 6. Natrium: [Ne]3s. Magnesium: [Ne]3s 2. Aluminium: [Ne]3s 2 3p.
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