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Lanthanida
Lanthanida inggih punika seka datu kimia sané madaging 15 datu, kakawitin saking lanthanum (La) ngantos lutésium (Lu) ring tabél périodik, antuk wilangan atom 57 nganti 71. Skandium, itterbium, miwah samian lanthanida kaloktah antuk logam tanah langka. Makasami lanthanida, tiosan lutesium, punika datu blok-f sané maartos pinaka éléktron nyané madaging ngantos orbit 4f. Golongan puniki kaicain parinama mawit lantanum. Prometium punika dados wantah satunggal datu lantanida sané radioaktip, antuk paruh idup isotop pinih tegteg nyané (145Pm) wantah 17,7 warsa.
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