Final answer:
The Lewis structure of the OH molecule can be determined by placing hydrogen in the center and oxygen to the side. There is one sigma MO and zero pi MO in the molecule. The LUMO and HOMO can be determined using the molecular orbital diagram of the OH molecule.
Step-by-step explanation:
The Lewis structure of the OH molecule can be determined by following these steps:
- Place the least electronegative atom, hydrogen (H), in the center and the oxygen (O) atom on the side.
- Connect the atoms with a single bond.
- Complete the octet of the oxygen atom by placing lone pairs around it. In this case, there are two lone pairs on the oxygen atom.
After determining the Lewis structure, we can use this information to answer the remaining questions.
The number of sigma (σ) MO can be determined by counting the number of bonding orbitals, which in this case is one. The number of pi (π) MO can be determined by counting the number of nonbonding orbitals, which in this case is zero.
The LUMO (lowest unoccupied molecular orbital) is the highest energy antibonding orbital, while the HOMO (highest occupied molecular orbital) is the highest energy bonding orbital. To determine the LUMO and HOMO, refer to the molecular orbital diagram of the OH molecule.