Answer: If you're looking for the type of bond, you need to find the difference in electromagnetically. The electromagnetically of Br is 2.96 and Si is 1.9. Subtracting the two will give you the difference of the previously mentioned (1.06).
For the bond to be POLAR the difference should fall between 0.5 and 1.6
For the bond to be NON-POLAR the difference should be 1.6