The Periodic Table first 20 elements
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THE FIRST TWENTY ELEMENTS
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The first 20 Elements, their atomic number and symbols video tutorial
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The Periodic Table Song.. ( credit goes to the rightful owner)
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Electron Configuration of First 20 Elements | Properties of Matter | Chemistry | FuseSchool
First 20 elements with symbols,valency,atomic and mass numbers,no:of protons,electrons,neutrons.