This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Valence Bond Theory describes covalent bond formation as the overlap of atomic orbitals. When two atoms approach each other, their atomic orbitals containing valence electrons overlap. This overlap results in the sharing of electrons between the two atoms, forming a covalent bond. The greater the overlap, the stronger the bond. This theory can explain the formation of sigma (σ) bonds, where the overlap is head-on along the internuclear axis, and pi (π) bonds, where the overlap is sideways above and below the internuclear axis. It also incorporates the concept of hybridization, where atomic orbitals mix to form new hybrid orbitals (like sp, sp², sp³) that have the correct geometry and energy for bonding.
Molecular Orbital Theory offers a more sophisticated explanation. It proposes that when atoms combine, their atomic orbitals merge to form new molecular orbitals that are delocalized over the entire molecule. These molecular orbitals can be either bonding orbitals (lower in energy, stabilizing the molecule) or antibonding orbitals (higher in energy, destabilizing the molecule). Electrons fill these molecular orbitals according to the Aufbau principle, Hund's rule, and the Pauli exclusion principle. Molecular Orbital Theory can successfully explain phenomena that Valence Bond Theory struggles with, such as the paramagnetism of oxygen (O₂) and the existence of molecules with fractional bond orders. It provides a more complete picture of electron distribution and bonding in molecules.
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Valence Bond Theory describes covalent bond formation as the overlap of atomic orbitals.
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.