Elements N, B, O are in the same period. With an increase in the nuclear charge of elements of one period, the atomic radius decreases and the number of valence electrons increases, as a result of which there is a weakening of the metallic and strengthening of the non-metallic properties of the elements. In the period, the metallic properties weaken from left to right, which means that the non-metallic properties increase. We write in ascending order of non-metallic properties: B, N, O.
Boron has the lowest non-metallic properties, oxygen has the highest.
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