Grade 12 Exam > Grade 12 Videos > Chemistry for Grade 12 > Orbital Overlapping & Valence Bond Theory
Orbital Overlapping & Valence Bond Theory Video Lecture | Chemistry for Grade 12
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FAQs on Orbital Overlapping & Valence Bond Theory Video Lecture - Chemistry for Grade 12
| 1. What is orbital overlapping in the context of valence bond theory? |  |
Ans. Orbital overlapping refers to the spatial interaction between atomic orbitals of two or more atoms when they form a chemical bond. It plays a crucial role in the formation of covalent bonds, as the overlapping of orbitals allows for the sharing of electrons between atoms.
| 2. How does valence bond theory explain the formation of chemical bonds? | |
Ans. Valence bond theory explains the formation of chemical bonds by considering the overlapping of atomic orbitals. According to this theory, when two atoms approach each other, their atomic orbitals overlap, leading to the formation of new molecular orbitals. These new orbitals are formed by a combination of the atomic orbitals, resulting in the sharing of electrons between the atoms and the formation of a bond.
| 3. What are the different types of orbital overlapping? | |
Ans. There are three main types of orbital overlapping: sigma (σ) bonding, pi (π) bonding, and delta (δ) bonding. Sigma bonding occurs when two s orbitals, or one s and one p orbital, overlap head-on along the bond axis. Pi bonding occurs when two p orbitals overlap side-by-side above and below the bond axis. Delta bonding involves the overlap of d orbitals.
| 4. How does orbital overlapping influence bond strength and stability? | |
Ans. The extent of orbital overlapping directly affects the strength and stability of a chemical bond. Greater overlapping leads to stronger bonds, as it allows for a more efficient sharing of electrons between atoms. Additionally, a larger overlap results in a lower bond length and higher bond energy, contributing to the stability of the bond.
| 5. Can valence bond theory explain the formation of all types of chemical bonds? | |
Ans. Valence bond theory is primarily used to explain the formation of covalent bonds. It can successfully describe the bonding in molecules with localized electron pairs. However, it has limitations in explaining the bonding in certain cases, such as molecules with delocalized electrons or compounds with extensive conjugation. In such instances, other theories like molecular orbital theory may be more appropriate for explaining the bonding behavior.
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Dec 23, 2024 Last updated |
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