Show the direction of the dipole moment in each of the following bonds (use the electronegativities given in Table 1.3):

a. CH3--Br
b. CH3--Li
c. HO--NH2
d. I--Br
e. CH3--OH
f. (CH3)2N--H

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TABLE 1.3 The Electronegativities of Selected Elementsa IA | IIA | IB | llB | IIIA | IVA | VA | VIA | VIIA Li Be 1.0 1.5 Na Mg 0.9 12 K Ca 0.8 1.0 2.0 2.5 3.0 3.5 4.0 Al Si P S CI 1.5 1.8 2. 2.5 3.0 3 2.8 increasing electronegativity 2.5 Electronegativity values are relative, not absolute. As a result, there are several scales of electronegativities. The electronegativities listed here are from the scale devised by Linus Pauling.