What are the conditions for combination of atomic theory?

1) The combining atomic orbitals should have comparable energy. 1s orbital can combine with another 1 s orbital but not with 2s orbital. 2) The combining atomic orbitals should have the same symmetry about the moecular axis.

What are the important conditions required for the linear combination of atomic orbitals to form molecular orbitals?

The important conditions required for the linear combination of atomic orbitals to form molecular orbitals are as follows: The combining atomic orbitals must have the same or nearly the same energy. 2.. The combining atomic orbitals must have the same symmetry about the molecular axis.

What do you mean by linear combination of atomic orbitals?

LCAO
A linear combination of atomic orbitals or LCAO is a quantum superposition of atomic orbitals and a technique for calculating molecular orbitals in quantum chemistry. In a mathematical sense, these wave functions are the basis set of functions, the basis functions, which describe the electrons of a given atom.

What do you understand by bonding and antibonding molecular orbitals What are the conditions for combination of atomic orbitals?

A dihydrogen molecule, H2, readily forms because the energy of a H2 molecule is lower than that of two H atoms. The σ1s orbital that contains both electrons is lower in energy than either of the two 1s atomic orbitals.

Why is it necessary that the combining orbitals must overlap to the maximum extent during formation of the molecular orbital?

-orbitals of another atom on account of improper orientation [Fig. The combining atomic orbitals must overlap to the maximum extent. Greater the extent of overlap, higher will be the electron density between the nuclei of a molecular orbital.

When two wavefunctions are added together what happens to the electron density between the nuclei?

Adding two atomic orbitals corresponds to constructive interference between two waves, thus reinforcing their intensity; the internuclear electron probability density is increased.

What are the characteristic features of bonding and antibonding orbitals?

Electrons in bonding orbitals stabilize the molecule because they are between the nuclei. They also have lower energies because they are closer to the nuclei. Antibonding orbitals place less electron density between the nuclei. The nuclear repulsions are greater, so the energy of the molecule increases.

Which condition is not Favourable for the combination of atomic orbital?

c) The combining atomic orbitals must have the same or nearly the same energy. This means in a homonuclear molecule, the 1s-atomic orbital of an atom can combine with the 1s-atomic orbital of another atom, and not with the 2s-orbital.

When two atomic orbitals overlap how many molecular orbitals will result?

When two identical atomic orbitals on different atoms combine, two molecular orbitals result (see (Figure)). The bonding orbital is lower in energy than the original atomic orbitals because the atomic orbitals are in-phase in the molecular orbital.

When atomic orbitals are combined out of phase destructively antibonding orbitals form?

5: Side-by-side overlap of each two p orbitals results in the formation of two π molecular orbitals. Combining the out-of-phase orbitals results in an antibonding molecular orbital with two nodes.