••(a) Assuming that the following pairs of elements combine covalently, predict the formulas of the resulting molecules.
p (C · m)
R0 (nm)
Cl and F
3.0 × 10−30
0.16
Br and Cl
1.9 × 10−30
0.21
I and Cl
4.1 × 10−30
0.23
(b) Use the observed dipole moments and bond lengths to confirm that these molecules are predominantly covalent.
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