Answer:
CO2 exhibits covalent bonding while Fe (iron) exhibits metallic bonding.
Step-by-step explanation:
CO2 is made up od C and O atoms. They are non metal. Since Oxygen is highly electronegative, it is able to polarise the electron cloud on the carbon atom. Hence, it prefers to 'share' its electrons. There is weak intermolecular instantaneous dipole-induced dipole (id-id) forces of attraction between the molecules and strong covalent bonds between the Carbon and Oxygen atoms within the molecule.
Fe is a metal. All metals exhibit metallic bonding. the Fe atoms are held in place by strong metallic bonds in a metal lattice.
Hence, this is also why the melting and boiling point of Fe is higher than CO2 as a larger amount of energy is needed to overcome the strong interatomic forces of attraction to break down the giant metal lattice to seperate the atoms.