some common elements with their valencies
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plz tell me valencies of iodine neon carbon
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ELEMENTS - VALENCY
➡️Oxygen - 2
➡️Hydrogen - 1
➡️Iron - 2,3
➡️Chlorine - 1
➡️Neon - 0
➡️ Nitrogen - 3
➡️Copper - 1,2
➡️Calcium - 2
➡️ Potassium - 1
➡️ Barium - 2
➡️ Sodium - 1
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