Question

part 2 of 3
select the single best geometry of becl4^2 - ion.
tetrahedral
trigonal pyramidal
trigonal planar
bent
part 3 of 3
enter the hybridization of the be atom in the becl4^2 - ion.

Explanation:

For the geometry of $BeCl_4^{2 - }$, beryllium has 2 valence electrons and it forms 4 bonds with chlorine atoms. The total number of electron - pair groups around Be is 4 with no lone pairs. According to VSEPR (Valence - Shell Electron - Pair Repulsion) theory, when the central atom has 4 bonding pairs and 0 lone pairs, the molecular geometry is tetrahedral. For the hybridization, when the central atom has 4 electron - pair groups, the hybridization is $sp^3$.

Answer:

Part 2 of 3: A. Tetrahedral
Part 3 of 3: $sp^3$