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結果 : list of first 20 elements with atomic number and mass
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Easiest Way To Remember Mass & atomic number of First 20 elements in 5 mins grade 8-10

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The Periodic Table first 20 elements

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Trick to Learn First 20 Elements of the Periodic Table

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Periodic Table Song (First 20 Elements)

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Trick to Learn Atomic Masses of First 30 Elements of the Periodic Table

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Easy trick to learn || Atomic mass|| 1 to 30 elements

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Periodic Table | First 20 Elements | Chemistry Knowledge | Easy English Learning Process

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How To Memorize The Periodic Table - Easiest Way Possible (Video 1)

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THE FIRST TWENTY ELEMENTS

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Science Ka Funda Video Series | Simple Way to Learn 1-20 Atomic Numbers | Knowlege Series | JR Talks

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Tricks to remember first 20 elements of the periodic table in sequence

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First 20 elements with symbols,valency,atomic and mass numbers,no:of protons,electrons,neutrons.

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Guess the Periodic Table Element by Symbol | Multiple Choice Questions and Answers

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How to find the number of protons, neutrons, and electrons from the periodic table

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The Periodic Table Song (2018 Update!) | SCIENCE SONGS

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Element name and symbol atomic number

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