The diagram that follows shows the highest-energy occupied MOs of a neutral molecule CX, where element X is in the same row of the periodic table as C.
(a) Based on the number of electrons, can you determine the identity of X?
(b) Would the molecule be diamagnetic or paramagnetic?
(c) Consider the π2p MOs of the molecule. Would you expect them to have a greater atomic orbital contribution from C, have a greater atomic orbital contribution from X, or be an equal mixture of atomic orbitals from the two atoms?

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TABLE 7.8Some Properties of the Noble Gases Electrorn Density Atomic Boiling Point (K) (g/L) Element Helium Neon Argon Configuration 1s2 [He]2s22p6 [Ne]3s3p 4.2 27.1 87.3 120 165 0.18 0.90 1.78 3.75 5.90 9.73 Radius* (Å) (kJ/mol) 0.32 0.69 0.97 1.10 1.30 1.45 2372 2081 1521 1351 1170 1037 Xenon [Kr]4d105s5p6 Radon