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5.
The electronegativity of an element depends on the size of the atom and effective nuclear charge. As the size of the atom decreases and the effective nuclear charge increases the electronegativity of the element increases.
The ionization potential of an element also depends on the size of the atom and effective nuclear charge. As the size of the atom decreases and the effective nuclear charge increases the ionization potential of the element increases.
Thus the periodic trend of electronegativity and ionization potential matches and the given statement is true.
Final answer: True
6.
Atomic radius: In the periodic table the atomic radius decreases from left to right because the effective nuclear char is increased from left to right.
From top to bottom of the periodic table the atomic radius increases because the new shell is added to the atom.
From the given options the P element belongs to the third period thus its atomic radius in highest.
C, N, and O are second-period elements, and the oxygen atom situated on the rightmost of the periodic table thus its atomic radius is the smallest.
Final answer- The right option is "O"
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