Statement 1 : The atomic radii of the elements of the oxygen family are smaller than the atomic radii of the corresponding elements of the nitrogen family.

Statement 2 : The members of the oxygen family are more electronegative because they have lower values of nuclear charge, than those of the nitrogen family.

Statement 1 : It is true. Across the period for addition of each successive element, the nuclear charge increases by one unit as electrons are added in the same shell. Hence the size of atom decreases along the period from left to right.

Statement 2 : The higher electronegativity of O than N is due to more nuclear charge in O than N.