For the following element, determine the number of valence electrons and its Lewis symbol.

Silicon

For the following element, determine the number of valence electrons and its Lewis symbol.

Oxygen

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of molecule.

Chlorine, ${\mathrm{Cl}}_2$

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of each molecule.

Methane, ${\mathrm{CH}}_4$

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of each molecule.

Carbon monoxide, $\mathrm{CO}$

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of each molecule.

Bromine, ${\mathrm{Br}}_2$

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of each molecule.

Nitrogen, ${\mathrm{N}}_2$

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of each molecule.

Ammonia, ${\mathrm{NH}}_3$

For the listed compound follow these steps. Determine the number of valence electrons for each atom in the compound from its electron configuration. Draw the Lewis symbol for each element. Predict the number of electron pairs to be shared in the molecule.  Draw the Lewis structure for the molecule. Identify whether the molecule has single, double or triple bonds. Describe the shape of each molecule.

Hydrogen fluoride, $\mathrm{HF}$