Question

State the valency of no element X whose electronic configurations is 2, 8 , 7

Answer 1

Answer:

Valency is defined as the combining capacity of atoms or molecules. It is obtained from the number of electrons present in the outermost shell of an atom. The atomic number of chlorine is 17 and the electronic configuration is 2, 8, 7. Therefore, the valency of chlorine is 1.

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Answer 2

Answer:-1

Explanation: As it needs only one electron to get stable, it gains it and becomes negatively charged.

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