Question

Which element is predicted to have the largest atomic radius? Justify the answer

Answer 1

Solution:

Cesium (Cs) is the element which posses largest atomic radius. The distance between outermost shell and nucleus is called atomic radius. Cs has atomic number 55, hence it posses total six orbital shells. Thus due to presence of large number of orbital shells, nuclear attraction with outermost electron is minimum, hence its radius is largest in the periodic table.