The wave functions of 1 s -orbitals of two hydrogen atoms are _A and _B . _A and _B are linearly combined to form two molecular orbitals ( . and . ^* ) . Which of the following statements are correct? I. ^* is equal to ( _A- _B ) . II. In -orbital, one nodal plane is present in between two nuclei. III. The energy of -orbital is lower than the energy of ^* -orbital.

Step-by-step solution

According to molecular orbital theory: I. ^* -orbital are formed by the substraction of two wave functions say _A and _B and therefore ^*= _A- _B . II. -orbital are formed when two orbitals are in same phase and thus, do not have nodal plane in between two nuclei. III. Combination of two sigma ( ) atomic orbitals given two molecular orbitals, out of which one is of lower energy called bonding orbital and other is of higher energy called ^* anti-bonding orbital. Hence, (i) and (iii) are the correct statements and op