Element 1?, Hydrogen, Helium, Beryllium, Lithium, Symbol for Hydrogen?, Be, Li, H, He, Element 2?, Neon, Helium, Hydrogen, Lithium, Symbol for Helium?, Li, Ne, H, He, Element 3?, Beryllium, Helium, Lithium, Boron, Symbol for Lithium?, Be, He, B, Li, Element 4?, Boron, Beryllium, Carbon, Lithium, Symbol for Beryllium?, Be, Ba, B, Br, Element 5?, Boron, Nitrogen, Carbon, Beryllium, Symbol for Boron?, Br, Bh, Be, B, Element 6?, Nitrogen, Boron, Carbon, Oxygen, Symbol for Carbon?, Ca, C, Co, Cu, Element 7?, Carbon, Oxygen, Neon, Nitrogen, Symbol for Nitrogen?, N, Na, Ni, Ne, Element 8?, Carbon, Fluorine, Oxygen, Nitrogen, Symbol for Oxygen?, Os, O, Au, Og, Element 9?, Chlorine, Oxygen, Neon, Fluorine, Symbol for Fluorine?, Fr, Fl, F, Fe, Element 10?, Neon, Fluorine, Argon, Sodium, Symbol for Neon?, Ni, Ne, N, Na

First 20 Element

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