What is the oxidizing agent in the reaction fe + agno3 fe(no3)3 + ag?

Answer;
             Silver is acting as oxidizing Agent.

Explanation:

The reaction is as follow,

                              Fe + 3 AgNo₃    →     Fe(NO₃)₃ + 3 Ag

In above reaction the Iron's oxidation state has changed from 0 to +3, i.e. 

                             Fe⁰      →     Fe³⁺  +  3 e⁻

It shows that Iron has lost 3 electrons, Hence, it is oxidized and has transferred 3 electrons to 3 mole of Ag⁺ to reduce it into Ag. Therefore, Iron is acting as reducing Agent.

While, In reaction the Silver's oxidation state has changed from +1 to 0, i.e. 

                             3 Ag⁺  +  3 e⁻     →     3 Ag

It shows that Silver has gained one electron, Hence, it is reduced and has gained 3 electrons from 1 mole of Fe to oxidize it into Fe³⁺. Therefore, Silver is acting as oxidizing Agent.

The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block.

Explanation: