Question

Name the cations that are largest single atom cations.

Answer 1

Cation is positively charged ion .Metal have tendency to lose electrons . A metal loss electrons from it valance shell to form cation. Group I has highest Ionisation energy so, tendency of lose electrons from valance shell are high. Also we know when we go top to down, atomic radius increases. It means H⁺ is the smallest cation and Fr⁺ is the largest cation . But francium is radioactive element so, we can neglect it . So, the largest cation is Cs⁺ ( Cesium)

hence, answer is Cs⁺

Answer 2

Cation is positively charged ion . Metal have tendency to lose electrons . A metal loss electrons from it valance shell to form cation.