Periodic Table, Rare Earth, Actinides part 3 series
Plutonium(Pu) vs. Protactinium(Pa) vs. Thorium(Th) vs. Uranium(U)
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Periodic Table, Noble Gas part 1 series
Argon(Ar) vs. Helium(He) vs. Krypton(Kr) vs. Neon(Ne) vs. Radon(Rn)
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Periodic Table, Noble Gas part 2 series
Xenon(Xe)
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Periodic Table, Alkali Earth part 1 series
Barium(Ba) vs. Beryllium(Be) vs. Calcium(Ca) vs. Magnesium(Mg) vs. Radium(Ra)
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Periodic Table, Alkali Earth part 2 series
Strontium(Sr)
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Periodic Table, Rare Earth, Lanthanides part 1 series
Cerium(Ce) vs. Dysprosium(Dy) vs. Erbium(Er) vs. Europium(Eu) vs. Gadolinium(Gd)
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Periodic Table, Rare Earth, Lanthanides part 2 series
Holmium(Ho) vs. Lutetium(Lu) vs. Neodymium(Nd) vs. Praseodymium(Pr) vs. Promethium(Pm)
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Periodic Table, Rare Earth, Lanthanides part 3 series
Samarium(Sm) vs. Terbium(Tb) vs. Thulium(Tm) vs. Ytterbium(Yb)
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Periodic Table, Alkali Met. part 1 series
Cesium(Cs) vs. Francium(Fr) vs. Lithium(Li) vs. Potassium(K) vs. Rubidium(Rb)
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