Question

Indicate the lewis structure of the anion albr4- and determine its geometry.

Answer 1

For hybridization we can use following formula

Number of total electron pairs = 0.5 (number of valence electrons - (charge) +  number of single bonded atoms)

number of total electron pairs = 0.5 (3 - (-1) + 4) = 4

So the hybridization = sp3

So the geometry will be tetrahedral

The lewis structure will be