two molecules have the same molecular geometry but different electron - domain geometries. which combination…

two molecules have the same molecular geometry but different electron - domain geometries. which combination of atoms and lone pairs around the central atom could describe these molecules?\no 2 atoms and 2 lone pairs; 3 atoms and 0 lone pairs\no 1 atom and 3 lone pairs; 2 atoms and 1 lone pair\no 3 atoms and 1 lone pair; 3 atoms and 0 lone pairs\no 2 atoms and 2 lone pairs; 2 atoms and 1 lone pair

two molecules have the same molecular geometry but different electron - domain geometries. which combination of atoms and lone pairs around the central atom could describe these molecules?\no 2 atoms and 2 lone pairs; 3 atoms and 0 lone pairs\no 1 atom and 3 lone pairs; 2 atoms and 1 lone pair\no 3 atoms and 1 lone pair; 3 atoms and 0 lone pairs\no 2 atoms and 2 lone pairs; 2 atoms and 1 lone pair

Answer

Brief Explanations:

  1. Recall VSEPR (Valence - Shell Electron - Pair Repulsion) theory. Electron - domain geometry is determined by the total number of electron domains (bonding pairs + lone pairs) around the central atom, while molecular geometry is determined by the positions of the atoms only.
  2. Analyze each option:
    • For 2 atoms and 2 lone pairs, the electron - domain geometry is tetrahedral and the molecular geometry is bent. For 3 atoms and 0 lone pairs, the electron - domain geometry is trigonal planar and the molecular geometry is trigonal planar. They have different molecular geometries.
    • For 1 atom and 3 lone pairs, the electron - domain geometry is tetrahedral and the molecular geometry is linear. For 2 atoms and 1 lone pair, the electron - domain geometry is trigonal planar and the molecular geometry is bent. They have different molecular geometries.
    • For 3 atoms and 1 lone pair, the electron - domain geometry is tetrahedral and the molecular geometry is trigonal pyramidal. For 3 atoms and 0 lone pairs, the electron - domain geometry is trigonal planar and the molecular geometry is trigonal planar. They have different molecular geometries.
    • For 2 atoms and 2 lone pairs, the electron - domain geometry is tetrahedral and the molecular geometry is bent. For 2 atoms and 1 lone pair, the electron - domain geometry is trigonal planar and the molecular geometry is bent. They have the same molecular geometry (bent) but different electron - domain geometries (tetrahedral and trigonal planar respectively).

Answer:

2 atoms and 2 lone pairs; 2 atoms and 1 lone pair