We assume that the energy of H 1s orbital is -13.6 eV (vs. vacuum, same below) and the and o* orbital in H2 molecule is -15.6 eV and -11.6 eV, respectively. Draw the band diagram of the H chain (energy E vs k). Sketch the density of states (DOS) Now we assume one of the H atoms in the chain is replaced by a transition metal M atom. The M atom's d orbitals are at -14 eV. When by itself alone, the M atom has a d electron configuration. After "doping" the M atom into the H chain, does the M atom become more electrophilic (electron-poor) or nucleophilic (electron-rich)? Explain H atom ........................