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Write the valency of first 20 element |
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Answer» The Valency of First 20 Elements Element Symbol Atomic Number Valency Hydrogen H 1 1 Helium He 2 0 Lithium Li 3 1 Beryllium Be 4 2 Boron B 5 3 Carbon C 6 4 Nitrogen N 7 3 Oxygen O 8 2 Fluorine F 9 1 Neon Ne 10 0 Sodium NA 11 1 Magnesium Mg 12 2 Aluminum Al 13 3 Silicon Si 14 4 Phosphorus P 15 3 Sulphur S 16 2 Chlorine Cl 17 1 Argon Ar 18 0 Potassium K 19 1 Calcium Ca 20 |
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