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How to find valancy |
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Answer» We find valency of any elments. Before we should know atomic no of the elment .after knowing atomic no we should eletronic confurgation.last eletrons left in valanced shell is valency of element Consider the following exampleThe atomic number of sodium is 11 (Z=11). The electronic configuration of sodium can be written as 2, 8, 1. 2, 8, 1 electrons are distributed in the shells K, L, M respectively. Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1. |
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