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What js vanlacy |
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Answer» Valency is combining capacity of an atom The outermost electron shell of an atom is called valence shell. The electrons present in outermost shell of an atom are called as valence electrons. The valence electron of an atom take part in a chemical reaction because they have more energy than all the inner electrons.For example: Sodium(Z=11)The electronic configuration of sodium isK L M2 8 1Valence Electrons = 1 |
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