Give reasons. Iron has higher enthalpy of atomization than that of copper.

Iron has higher enthalpy of Atomisation than that of copper. The enthalpy of Atomisation depends on the number of unpaired electrons. Greater are the number of unpaired electrons, stronger are the metallic bonds and higher is the enthalpy of Atomisation. Iron has outer electronic configuration of 3d⁶4s² and 4 unpaired electrons. Copper has outer electronic configuration of 3d¹⁰4s¹ and 1 unpaired electron. Iron has more number of unpaired electrons than copper. Hence, Iron has higher enthalpy of atomisation than that of copper.