Dioxide electron configurations

Write down the electronic configurations for the ground states of the molecules water, carbon dioxide, formaldehyde, ethene, benzene, and the nitrogen dioxide radical. The occupied MO s shall be given using the full point group symmetry of the molecule. 

Each oxygen needs to share two electrons to gain the electron configuration of neon. This is achieved by forming two double covalent bonds in which two pairs of electrons are shared in each case, as shown in Figure 3.28. Carbon dioxide is a linear molecule (Figure 3.29). 

I. First, from the electronic configuration of the elements, determine a reason able Lewis stnicture. For example, in the carbon dioxide molecule, there will be a total of 16 valence electrons to distribute among three atoms ... 

Nearly all of the carbon on Earth is present as the stable isotope carbon-12. A very small percentage of the carbon in Earth s crust is carbon-14. Carbon-14 undergoes decay to form nitrogen-14. Because carbon-12 and carbon-14 have the same electron configuration, they react chemically in the same way. Both of these carbon isotopes are in carbon dioxide, which is used by plants in photosynthesis. 

Carbon and silicon belong to Group 4A of the periodic table and have the same valence electron configuration (ns np ). Why does silicon dioxide (Si02) have a much higher melting point than carbon dioxide (CO2) ... 

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