Complete Table 2.1 so that it shows the numbers of protons, neutrons and electrons in one atom of $^{11}\text{B}$.
Determine the relative abundance of $^{11}\text{B}$ in boron. Express your answer as a percentage.
Use boron’s relative atomic mass to work out how many atoms are in 0.540 g of boron. Present your answer in standard form.
Name the ore from which aluminium is obtained.
Name the other substance and state why it is added.
Write the ionic half-equation for the cathode reaction.
Explain why the anodes must be replaced frequently.
State two physical properties of aluminium that make it suitable for use in overhead electrical cables.
Explain why aluminium appears unreactive.
Write the symbol equation for this reaction.
Complete Fig. 2.2 to show the electronic configuration of one aluminium ion and one fluoride ion, and indicate the charges on the ions.