The Lewis diagram for SeOBr2 is

. The Lewis diagram for SeOBr2 is: The electron-pair geometry around the Se atom in SeOBr2 is fill in the blank 1. There are lone pair(s) around the central atom, so the geometry of SeOBr2 is fill in the blank 3. B. The Lewis diagram for SO2Cl2 is: The electron-pair geometry around the S atom in SO2Cl2 is fill in the blank 4. There are lone pair(s) around the central atom, so the geometry of SO2Cl2 is fill in the blank 5.

The Correct Answer and Explanation is:

Let’s break this down step by step for each compound, starting with SeOBr2.

SeOBr2:

1. Lewis Diagram:
   • Selenium (Se) is the central atom, surrounded by two oxygen (O) atoms and two bromine (Br) atoms.
   • Each O atom will form a double bond with Se, and each Br atom will form a single bond with Se.
   • The Se atom will have two lone pairs of electrons, as it follows the octet rule.
2. Electron-Pair Geometry:
   • The electron-pair geometry is based on the number of bonding and lone pairs around the central atom.
   • SeOBr2 has 4 regions of electron density (two single bonds and two double bonds).
   • According to the VSEPR theory, 4 regions of electron density arrange themselves in a tetrahedral geometry.
3. Molecular Geometry:
   • However, there are lone pairs on the Se atom, which slightly distort the geometry from ideal tetrahedral.
   • With two lone pairs, the molecular geometry will be bent or V-shaped, similar to the geometry of water (H2O) but less pronounced.

SO2Cl2:

1. Lewis Diagram:
   • Sulfur (S) is the central atom, surrounded by two oxygen (O) atoms and two chlorine (Cl) atoms.
   • Each O atom will form a double bond with S, and each Cl atom will form a single bond with S.
   • The S atom will have one lone pair of electrons.
2. Electron-Pair Geometry:
   • The S atom in SO2Cl2 has 4 regions of electron density (two double bonds with O and two single bonds with Cl).
   • This results in a tetrahedral electron-pair geometry.
3. Molecular Geometry:
   • Since there is one lone pair on the S atom, the geometry will be slightly distorted.
   • The molecular geometry will be trigonal pyramidal, where the lone pair occupies one of the positions of the tetrahedron, leaving the atoms to form a pyramid shape.

Summary:

• SeOBr2: Electron-pair geometry is tetrahedral; molecular geometry is bent (due to lone pairs).
• SO2Cl2: Electron-pair geometry is tetrahedral; molecular geometry is trigonal pyramidal (due to lone pair).