The strongest elemental oxidizing agents are found in the Group 17 region of the periodic table while the strongest reducing agents are found in the Group 1 region of the periodic table.
Explanation:
Strongest oxidizing agent means the elements which can oxidize others and themselves gets reduced easily. It means they can accept electrons easily. An element can gain electron easily if it may attain a half or full filled stability.
thus elements of group 17 is the region where we can found strongest elemental oxidizing agents.
Strongest reducing agents means the element can reduce others easily and thus can lose electrons easily. This is possible if an element attains a stability by losing electrons. Thus elements of group 1 is the region where we can found reducing elemental reducing agent.
