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Yes and no. It depends on how you are looking at the periodic table. If you go down the periodic table, then yes, there is a direct relationship. As the value of n increases, the radius and the number of electrons both increase because there addition of a new shell, because of the addition of electrons, increases the radius. If you go across the period table, then no, there is an inverse relationship. As you move across, the charge of the nucleus increases so that even with the addition of more electrons, the nucleus is pulling the electrons closer which reduces the size of the radius of the atom.
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