7. How can you find the valency of nitrate Ion with the help of the
valency of hydrogen atom? explain.
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Let us find the valency of nitrate
NO3 (Nitrate ion) has three oxygen and one nitrogen atom. Nitrogen belongs to group -15 in the periodic table and it forms bonds with three oxygen atom with +5 charge. Oxygen belongs to the group – 16 in the periodic table, thus it has a valency f -2.
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