3) Table 5.1 of your text (below) gives the vibrational frequencies of a few diatomic molecules. Note the vibrational frequency of N2 > O2 > Cl2 > Br2 > 12, apparently scale inversely with molecular weight, while the frequency of H2 > D2 > N2, seem to scale directly with molecular weight. What do these variations tell you about the nature of the potential between these atoms? Provide a chemical rationale to account for the variation of these frequencies. TABLE 5.1 The fundamental vibrational frequencies, the force constants, and bond lengths of some diatomic molecules Molecule /cm A/Nm Bond length/pm 570 527 74.1 74.1 1275 141.4 160.9 H, D HCI H"Be H cia BrBr 127 MO" I'NIN co 4401 2990 2886 2630 2230 554 323 213 1556 2330 2143 1876 198.8 478 408 291 319 240 170 1142 2243 1857 1550 17 117 228.4 266.7 120.7 109.4 112.8 115.1 307.8 236,1 266,2 158 Na Na Na CI KC 378 278 84