Problem: Predict which molecules are polar. Select all that apply.a) AsF3b) IOF5c) CF4d) CH2Cl2

FREE Expert Solution

a. AsF3

Step 1: Arsenic (EN = 2.18) is less electronegative than fluorine (EN = 3.98) so arsenic is the central atom

Step 2: The total number of valence electrons present in AsF3is:

            Group             Valence Electrons

As       5A                   1 × 5 e5 e

F         7A                   3 × 7 e21 e

Total:  26 valence e

Step 3: The Lewis structure is:

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Problem Details

Predict which molecules are polar. Select all that apply.

a) AsF3

b) IOF5

c) CF4

d) CH2Cl2

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