A group of spectroscopists believes that they have detected one of the following species: $\mathrm{NeF}^2 \mathrm{NeF}^{+}$, or $\mathrm{NeF}$. Assume that the energy-level diagrams of Figure 11-25 apply, and describe the bonding in these species. Which of these species would you expect the spectroscopists to have observed?

Write plausible molecular orbital occupancy diagrams for the following heteronuclear diatomic species:

$$\mathrm{CO}$$

Write plausible molecular orbital occupancy diagrams for the following heteronuclear diatomic species:

$$\mathrm{CN}^{-}$$

Describe the bond order of diatomic carbon, $\mathrm{C}_2$, with Lewis theory and molecular orbital theory, and explain why the results are different.

$\mathrm{N}_2(\mathrm{~g})$ has exceptionally high bond energy. Would you expect either $\mathrm{N}_2{ }^{-}$or $\mathrm{N}_2{ }^{2-}$ to be a stable diatomic species in the gaseous state? Explain.

To represent the bonding of the following molecules:

$$\mathrm{HONO}$$

Use the method of Figure 11-19 to represent bonding in each of the following ions: (a) $\mathrm{NO}_2{ }^{-}$;

Use the method of Figure 11-19 to represent bonding in each of the following molecules: (a) $\mathrm{CCl}_4$;

Write Lewis structures for the following molecules, and then label each $\sigma$ and $\pi$ bond. (a) $\mathrm{HCN}$;

Describe a hybridization scheme for the central $\mathrm{Cl}$ atom in the molecule $\mathrm{ClF}_3$ that is consistent with the geometric shape pictured in Table 10.1. Which orbitals of the $\mathrm{Cl}$ atom are involved in overlaps, and which are occupied by lone-pair electrons?

which hybridization would you expect for carbon in the following molecules:

$$\ce{CH4, H2CO, HCN, CH2Cl2}$$

Explain why it is necessary to hybridize atomic orbitals when applying the valence bond method that is, why are there so few molecules that can be described by the overlap of pure atomic orbitals only?

The vapor pressure of $\ce{CCl3F}$ at $\ce{300 K}$ is $\ce{856 torr}$. If $\ce{11.5 g}$ of $\ce{CCl3F}$ is enclosed in a $\ce{1.0-L}$ container, will any liquid be present? If so, what mass of liquid?

The vapor pressure of $CCl_3F$ at 300 K is 856 torr. If 11.5 g of $CCl_3F$ is enclosed in a 1.0-L container, will any liquid be present? If so, what mass of liquid ?