1945
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Promethium
Transuranium element
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Technetium
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Thulium
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Tellurium
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Synthetic element
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Samarium
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Radium
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Prometheus
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Periodic table
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Ore
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Neptunium
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Neodymium
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Lanthanide
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Lanthanum
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Henry Moseley
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Hafnium
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Holmium
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Europium
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Timeline of chemical element discoveries
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Chemical element
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Actinide
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Atom
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Period (periodic table)
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List of chemists
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Electron configuration
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Chemical symbol
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Atomic radius
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Nucleosynthesis
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Uraninite
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Trace radioisotope
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Stable nuclide
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Standard electrode potential (data page)
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Radionuclide
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