91Ó°ÊÓ

For each of the following neutral atoms give the core charge. a) Li. b) \(\quad \ddot{\mathrm{Cl}}\) c) He:

Give the Lewis representation for each of the following atoms. a) iodine b) calcium c) phosphorus

Given the shell model of the atom, suggest a possible reason that Lewis proposed a maximum of two electrons for hydrogen and a maximum of eight for carbon, nitrogen, oxygen, and fluorine atoms?

Answer the following for the nitrogen atom: a) What is the Lewis representation for \(\mathrm{N} ?\) b) How many additional electrons does one \(\mathrm{N}\) atom require when it forms a molecule? c) What is the likely formula for a molecule composed of hydrogen atoms and one nitrogen atom? Draw the Lewis structure for this molecule.

What is the likely formula for a molecule composed of hydrogen atoms and one sulfur atom? Draw the Lewis structure for this molecule.

Make a checklist that can be used to determine if a Lewis structure for a molecule is correct.

Without attempting to draw a Lewis structure, calculate the total number of valence electrons in each of these molecules: a) \(\mathrm{H}_{2} \mathrm{CO}\) b) \(\mathrm{N}_{2}\) c) \(\mathrm{Cl}_{2}\)

What is the total number of electrons in the Lewis structure in Model 3 for each molecule: a) \(\mathrm{H}_{2} \mathrm{CO}\) b) \(\mathrm{N}_{2}\) c) \(\mathrm{Cl}_{2}\)

For \(\mathrm{Cl}_{2}\), is the sum of the bonding electrons and the lone pair electrons (also known as nonbonding electrons) around each Cl atom consistent with the Lewis model?

For \(\mathrm{N}_{2}\), is the sum of the bonding electrons and nonbonding electrons around each nitrogen atom consistent with the Lewis model?