Rare Earth Metals – Principle Signals & Expansions   Using Alphabetical Sequence:   Ce, Dy, Er, Eu, Gd, Hf, Ho, La, Lu, Nd, Pr, Sm, Tb, Tm, Yb ( not using Atomic # Sequence:  La-57,  Ce-58,  Pr-59,  Nd-60,  (Pm-61),  Sm-62,  Eu-63,  Gd-64,  Tb-65,  Dy-66,  Ho-67,  Er-68,  Tm-69,  Yb-70,  Lu-71,  Hf-72) Ce  (Cerium) Ce  (Cerium) Dy  (Dysprosium) […]

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