A. What is the electron-pair geometry for S in SOF4? _ There are lone pair(s) around the central atom, so the molecular geometry (shape) of SOF4 is B. What is the electron-pair geometry for Cl in ClF5? There are lone pair(s) around the central atom, so the molecular geometry (shape) of ClF5 2. A. What is the electron-pair geometry for N in NH3? There are lone pair(s) around the central atom, so the molecular geometry (shape) of NH3 is B. What is the electron-pair geometry for Be in BeBr2? _ There are lone pair(s) around the central atom, so the molecular geometry (shape) of BeBr2 is __
The Correct Answer and Explanation is:
SOF4 (Sulfur Tetrafluoride Oxide)
- Electron-pair geometry for S: In SOF4, sulfur is the central atom, and it is bonded to four fluorine atoms and one oxygen atom. The sulfur atom has a total of 5 regions of electron density around it: 4 single bonds with fluorine and 1 single bond with oxygen. This leads to a trigonal bipyramidal electron-pair geometry.
- Number of lone pairs around the central atom: There are no lone pairs on sulfur in SOF4 because all the electron pairs are involved in bonding.
- Molecular geometry (shape): Since there are no lone pairs, the molecular geometry will also be trigonal bipyramidal, which reflects the electron-pair geometry.
2. ClF5 (Chlorine Pentafluoride)
- Electron-pair geometry for Cl: In ClF5, chlorine is the central atom, bonded to five fluorine atoms. There are 5 bonding regions and 1 lone pair of electrons on chlorine, resulting in a octahedral electron-pair geometry.
- Number of lone pairs around the central atom: There is 1 lone pair on chlorine in ClF5.
- Molecular geometry (shape): The presence of one lone pair distorts the electron-pair geometry, making the molecular geometry square pyramidal.
3. NH3 (Ammonia)
- Electron-pair geometry for N: In NH3, nitrogen is the central atom, bonded to three hydrogen atoms. There are three bonding regions and one lone pair on nitrogen, leading to a tetrahedral electron-pair geometry.
- Number of lone pairs around the central atom: There is 1 lone pair on nitrogen in NH3.
- Molecular geometry (shape): The molecular geometry is trigonal pyramidal, as the lone pair on nitrogen pushes the bonding pairs closer together, creating a pyramid-like shape.
4. BeBr2 (Beryllium Bromide)
- Electron-pair geometry for Be: In BeBr2, beryllium is the central atom, bonded to two bromine atoms. There are no lone pairs on beryllium, and only two bonding pairs of electrons, which results in a linear electron-pair geometry.
- Number of lone pairs around the central atom: There are 0 lone pairs on beryllium in BeBr2.
- Molecular geometry (shape): Since there are no lone pairs, the molecular geometry is also linear.
Summary:
- SOF4:
- Electron-pair geometry: Trigonal bipyramidal
- Lone pairs: 0
- Molecular geometry: Trigonal bipyramidal
- ClF5:
- Electron-pair geometry: Octahedral
- Lone pairs: 1
- Molecular geometry: Square pyramidal
- NH3:
- Electron-pair geometry: Tetrahedral
- Lone pairs: 1
- Molecular geometry: Trigonal pyramidal
- BeBr2:
- Electron-pair geometry: Linear
- Lone pairs: 0
- Molecular geometry: Linear
