The Periodic Table first 20 elements
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Easiest trick to learn Valency of Elements 1 - 30 - Dr K
Valency Trick: Trick to find valency of 1 to 20 elements,Trick to learn valency of 1 to 20 elements
Name of element, symbol, valency
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All 118 elements of Chemstry with atomic no with symbol
THE FIRST TWENTY ELEMENTS
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valency of the first 20 elements
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Periodic Table Song (First 20 Elements)
