find out the position of the following element in the periodic table from the electronic configuration (a) Nitrogen (atomic number.7) (b) oxygen (atomic number.8)
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The electronic configuration of nitrogen N(7)=2,5
Phosphorous P(15)=2,8,5
N is more electronegative than P.
From top to bottom down a group, electronegativity decreases. This is because number of shell increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.
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