Which bonding theory assumes that the formation of a bond leads to lower energy?

Question

Which bonding theory assumes that the formation of a bond leads to lower energy?

Valence Bond Theory

Both Valence Bond Theory and Molecular Orbital Theory

Molecular Orbital Theory

What does the following figure represent?

the overlap of two 1s orbitals to form a sigma bond

the overlap of two 2p orbitals to form a sigma bond

the overlap of a 1s orbital and a 2p orbital to form a sigma bond

the overlap of two 1s orbitals to form a pi bond

the overlap of a 1s orbital and a 2p orbital to form a pi bond

Explanation / Answer

1.

According to Valence Bond theory, during bond formation, the energy of the moleucle will be lowered.

similarly, Molecular orbital theory, the bonding orbital has lower energy than anti-bonding orbital

So both the theories assumes that the formation of bond leads to lower energy

2.

It depicts,

the overlap of a 1s orbital and a 2p orbital to form a sigma bond.

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