(a)[3]
Fill in the table so that it displays the electronic structure of the atoms and ions.
(b)[1]
State the formula of the compound made from $\text{Ca}^{2+}$ and $\text{N}^{3-}$.
(c)[3]
Draw a dot-and-cross diagram that shows the electron arrangements in the two ions found in lithium chloride, $\text{LiCl}$. Show only the outer-shell electrons. Remember to include the ionic charges.
(d)[3]
Draw a dot-and-cross diagram to show the electron arrangement in a sulfur dichloride molecule. Show only the electrons in the outer shell.
(e)[3]
Explain, in terms of attractive forces, why the melting point of $\text{LiCl}$ is higher than that of $\text{SCl}_2$.
(f)[1]
Suggest the name of a covalent compound that has a higher melting point than $\text{LiCl}$.