Draw the Lewis structure for each molecule. carbon dioxide, $CO_2$

Draw the Lewis structure of ammonia, $\mathrm{NH}_3$.

One molecule has ____ ${N}$ atom(s) and ____${H}$ atom(s).

Each ${N}$ atom has ____ valence electrons. Each $\mathrm{H}$ atom has_____valence electrons.

There are ____ valence electrons available for bonding. Use the space at the right to arrange the $\mathrm{N}$ and $\mathrm{H}$ atoms, using dots to represent electron pairs and lone pairs. Make sure the final result contains the same number of dots as there are valence electrons available for bonding.

Write the electron-dot notation for the following element.

selenium

Complete the following table.

Write the electron-dot notation for the following element.

silicon

Determine the shape of these molecule

boron trichloride _______

Complete the following table.

Write the electron-dot notation for the following element.

nitrogen

What is the Lewis structure of a carbonate ion, $\mathrm{CO}_3$ ? What is the charge on a carbonate ion?

Complete the following table.

Write the electron-dot notation for the following element.

hydrogen

Determine the shape of these molecule

tetrabromomethane _______

Complete the table with respect to bonds formed between the pairs of atoms

Why can ozone not be represented by the structure O=O=O alone?