Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE

For an octahedral molecule \( \text{AB}_6 \) (such as \( \text{SF}_6 \)) with zero lone pairs on the central atom, calculate the ratio of the number of \( 90^\circ \) \( \text{B}-\text{A}-\text{B} \) bond angles to the number of \( 180^\circ \) \( \text{B}-\text{A}-\text{B} \) bond angles.

1. A
   \( 3 : 1 \)
2. B
   \( 4 : 1 \)
3. C
   \( 6 : 1 \)
4. D
   \( 2 : 1 \)