Give two differences between sodium ion and sodium atom.
 

Draw electron dot diagrams to depict the formation of:

Magnesium oxide from ${}_{12}\mathrm{Mg}^{24}$ and ${}_8\mathrm{O}^{16}$

Draw electron dot diagram to depict the formation of molecule of chlorine from two atoms of ${}_{17}\mathrm{Cl}^{35}$.