Using data from Table 9.2, find the force constants k for O₂, I₂, and N₂. Is there a physical explanation for the relative magnitudes of these values?

Table 9.2 Spectroscopic constants for diatomics in the ground electronic state V, cm-1 x.v, cm-1 B, cm- de, cm-1 R, Do, ev 11.67 1.6326 1.3117 3.6 13.46 1.9313 1.1281 10.96 0.7416 1.2746 2.6666 1.094 12C2 12C160 H 1H35CI 12712 14N 1602 16O1H 1641.35 2170.21 4395.20 117.9 2989.74 52.05 214.57 2359.61 1580.36 3735.21 0.6127 14.456 12.073 82.81 60.80 10.59 0.03735 1.998 1.4456 18.871 0.01683 0.01896 2.993 0.3019 0.000117 0.01731 0.01579 0.714 1.20739 0.9706 4.476 4.430 1.5417 7.373 5.080 4.35