Why do the two elements silver an iron have different properties

Properties (especially chemical properties) of elements are usually determined by the valence shell electrons. Because silver and iron have a different number of valence shell electrons, their chemical properties are different.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

The answers are 3.c kelvin4.b liquids only