Rationalize the energy level diagrams below. 0₂ 111: 2p 1L 2s σ* 0* :11. N 111 2p 1L 2s 1 28 नैनै 111 2p 1 28 What are the corresponding bond orders? Draw the MO diagram of H2 and He and calculate the bond orders. What is the physical interpretation of this result?

The molecules N2 and CO are isoelectronic but their properties are quite different. Although as a first approximation we often use the same MO diagram for both, suggest how the MOs in N2 and CO might be different.

Why is the concept of hybridization required in valence bond theory?

When is it desirable to use MO theory rather than valence bond theory?

The bond length in C2 is 131 pm. Compare this with the bond lengths in C2H2 (120 pm), C2H4 (134 pm), and C2H6 (153 pm). What bond order would you predict for C2 from its bond length? Does this agree with the molecular orbital configuration you would predict for C2?

Complete the table below, which lists information about some diatomic molecules or molecular ions. In particular: . Decide whether each molecule is stable or not. Decide whether each molecule would be diamagnetic or paramagnetic. ● Calculate each molecule's bond order. ● molecule H₂ 2 Be2 Li₂ stable? O yes O no O yes O no OO O yes no diamagnetic or paramagnetic? O diamagnetic paramagnetic diamagnetic paramagnetic Odiamagnetic paramagnetic bond order 0 1 0 00

Use the blank MO diagram (below) to aid in answering the question. Calculate the bond order for BO. . Пр Op Op Os a * Os * Jup - Пр

Complete the table below, which lists information about some diatomic molecules or molecular ions. In particular: . Decide whether each molecule is stable or not. • Decide whether each molecule would be diamagnetic or paramagnetic. • Calculate each molecule's bond order. molecule C₂ Ne ₂ stable? O yes O no yes O no O yes O no 1 H 0 0 diamagnetic or paramagnetic? O diamagnetic paramagnetic diamagnetic paramagnetic O diamagnetic O paramagnetic bond order 2 X

Complete the table below, which lists information about some diatomic molecules or molecular ions. In particular: . Decide whether each molecule is stable or not. • Decide whether each molecule would be diamagnetic or paramagnetic. Calculate each molecule's bond order. . molecule Li₂ N₂ B stable? yes no yes no O yes no diamagnetic or paramagnetic? diamagnetic paramagnetic diamagnetic paramagnetic diamagnetic paramagnetic bond order 0 0 0 8 X

A Moving to another question will save this response. Question 1 Which is the correct molecular orbital diagram for O 2 ion? Oo 2s 1lo 2s t 1 T2p 1 1.t102p tI 2p t o 2s 1ļo 2s 11 m2p 1102p 1 1 72p tt t o 2s 1lo 2s 11 T|2p 1 1. t102p t 2p t1 o 2s 1ļo 2s 1 2p ↑ 1. t L. t I o2p ↑ 1 12p t O o 2s 1io 2s t I 12p ↑ 1 02p ↑ 1 12p t 1.t A Moving to another question will save this response.