Which element in the periodic table has the largest atomic radius?

Question:- Which element in the periodic table has the largest atomic radius?

Answer: Francium

Francium, symbol Fr and atomic number 87 is a chemical element in the periodic table that has a very large atomic radius than any other element. This is a characteristic due to its relative position as the largest, heaviest alkali metal belonging to the extreme left of the periodic table of elements. Atomic radius in general, increases with the group in the periodic table moving down closer to the noble gases because each new level added to the atom incorporates a new energy level or shell. Francium is located at the bottom of Group 1, and because of that, it has the greatest number of electron shells among all the stable and semi-stable elements. Also, being an alkali metal, francium’s atomic number is just one valence electron which experiences less pull from the nucleus due to shielding. These facts combined put francium as the element with the largest atomic radius despite the element’s scarcity and radioactivity hindering direct measurements.