<span>A fast way to separate the mixture would be to use a magnet. Iron is magnetic while copper is not. The second method would be to visually separate them since iron and copper distinctly different colors.</span>
<span>Because it has very weak intermolecular meaning it takes little energy to break them and turn it into a gas</span>
Iron radiates energy faster than lead. Iron has higher heat conductivity than lead.
The energy required is Ionization energy