Europium Discovery In 1890, French chemist Paul E. Lec...
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Europium Discovery In 1890, French chemist Paul E. Lec...
Samarium Discovery Samarium was discovered by French chemis...
Praseodymium Discovery Praseodymium and neodymium were discovere...
Neodymium Discovery Neodymium and praseodymium were discovered&n...
...
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