(i) Mention two conditions for the linear combination of atomic orbitals.
(ii) Write the electronic configuration of `C_(2)` moleuclar. What is its magnetic property?

Explanation

a. the combining atomic orbitals must have the same or nearly the same energy
b. The combining atomic orbitals must have the same symmetry about the molecular axis.
c. The combining atomic orbitals must everlap to the maximum extent.
It is diamagnetic E.C. of `C_(2)` moleucle is `sigma 1s^(2) sigma***1s^(2) sigma 2s^(2) sigma *** 2s^(2) pi 2px^(2)=pi2py^(2)`