Sodium and aluminium have atomic numbers 11 and 13, respectively. They are separated by one element in the periodic table, and have valencies 1 and 3 respectively. Chlorine and potassium are also separated by one element in the periodic table (their atomic numbers being 17 and 19, respectively) and yet both have valency 1. Explain.

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Answers

2015-08-22T15:48:46+05:30
It depends on the number of electrons present in outer most orbital as to become inert gas so chlorine and potassium losses the electron so it valency is1
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