Which One of the Following Atoms Has the Largest Radius?

Answer

Atomic radius is the measure of the distance between the nucleus of the atom and the outer ring of electrons. Caesium has the largest atomic radius of 225 pm. Helium has the smallest atomic radius of 32 pm.
Reference:
Q&A Related to "Which One of the Following Atoms Has the Largest..."
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The current largest atomic radius known is that of Caesium (Cesium in USA) with a empirically measured atomic radius of about 298 picometers.
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Potassium has the largest radius. It is true that bromine has more electrons but it also has more protons pulling them towards the nucleus and there is a general trend for the atomic
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The atomic radii of the main group elements increase going down a group and decrease going across a period. In other words, the lower left corner of the periodic table has the largest
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