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The atomic radius of an element generally decreases as you move from left to right across a period on the Periodic Table. This is because the number of protons and electrons increases, leading to a stronger attraction between the nucleus and the outer electrons, causing the atomic radius to decrease. However, the atomic radius tends to increase as you move down a group on the periodic table due to the addition of new energy levels, which results in the electrons being further away from the nucleus.

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3mo ago

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