Valence Bond Theory was developed in the yeara)1916b)1927c)1930d)1932Correct answer is option 'B'. Can you explain this answer?

Question

Answer

Answer

In 1916 , Valance band theory draws from Lewis structures. G.N. Lewis proposed these structures in 1916, based on the idea that 2 shared bonding electrons form chemical bonds. Therefore, option 'A'is the correct answer.

Answer

Valence Bond Theory and its development

Valence Bond Theory is a chemical bonding theory that describes the formation of chemical bonds between atoms in terms of the overlap of atomic orbitals. It was developed in the year 1927 by Walter Heitler and Fritz London.

Explanation of the development of Valence Bond Theory:

1. Early theories of chemical bonding: Before the development of Valence Bond Theory, there were several theories proposed to explain the nature of chemical bonding. Some of these theories were the Lewis theory of bonding, the Bohr theory of bonding, and the electron-pair theory.

2. The limitations of earlier theories: These earlier theories had some limitations in explaining the properties of molecules and the nature of chemical bonding. For example, the Lewis theory was unable to explain the difference between the bonding in H2 and O2 molecules.

3. The development of Valence Bond Theory: In 1927, Walter Heitler and Fritz London proposed the Valence Bond Theory to overcome the limitations of earlier theories. This theory describes the formation of covalent bonds between atoms in terms of the overlap of atomic orbitals.

4. Key concepts of Valence Bond Theory: According to the Valence Bond Theory, a covalent bond is formed when two atomic orbitals overlap and share a pair of electrons. The strength of the bond is determined by the extent of the overlap between the atomic orbitals.

5. Success of Valence Bond Theory: The Valence Bond Theory was successful in explaining many properties of molecules, such as bond angles and bond lengths. It was also able to explain the difference between the bonding in H2 and O2 molecules, which the Lewis theory was unable to do.

In conclusion, Valence Bond Theory was developed in the year 1927 by Walter Heitler and Fritz London to explain the nature of chemical bonding. It describes the formation of covalent bonds between atoms in terms of the overlap of atomic orbitals, and it has been successful in explaining many properties of molecules.

Answer

Yes by heitler and london & later modified by pauling

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