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1. Scandium (A.N. 21)
2. Yttrium (A.N. 39)
3. Lanthanum (A.N. 57)
4. Cerium (A.N. 58)
5. Praseodymium (A.N. 59)
6. Neodymium (A.N. 60)
7. Promethium (A.N. 61)
8. Samarium (A.N. 62)
9. Europium (A.N. 63)
10. Gadolinium (A.N. 64)
11. Terbium (A.N. 65)
12. Dysprosium (A.N. 66)
13. Holmium (A.N. 67)
14. Erbium (A.N. 68)
15. Thulium (A.N. 69)
16. Ytterbium (A.N. 70)
17. Lutetium (A.N. 71).
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