Answer : Silver and Iron belongs to different category of elements and have different properties because their atomic groups in the periodic table is different.
Explanation : In the modern periodic table silver and iron are placed under different groups. Each group has certain similar properties, but due to placement of silver and iron into different groups their properties differ.
Silver is placed in group 11 along with gold and copper, whereas iron is placed in group 8 along with ruthenium, osmium and hassium. Their reactivities are also greatly influenced by the groups.
There is also another factor which influences their chemical properties, which is valency of the element. Valency of silver is +1 whereas valency of iron is +2 or +3. The chemical properties change accordingly with the valencies.
