The number of molecular orbitals are:
Equal to the number of combining atomic orbitals.
Not equal to the number of combining atomic orbitals.
Equal to twice the number of combining atomic orbitals.
None of the these.
The number of molecular orbitals formed is equal to the number of combining atomic orbitals. When two atomic orbitals combine, two molecular orbitals are formed. One is known as bonding molecular orbital while the other is called antibonding molecular orbital.
Hence , option number (1) is correct.
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