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  3. Chemistry
  4. The atom of smallest atomic radius among the following is

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Q. The atom of smallest atomic radius among the following is

J & K CETJ & K CET 2009Classification of Elements and Periodicity in Properties

Solution:

When we move from left to right in the Periodic Table, atomic radius decreases. While in a group atomic radius, increases from up to down. Moreover, the radius of alkali metals is metallic radius and that of halogens is covalent radius and metallic radius > covalent radius. Thus, Br has the smallest atomic radius.