The graph displays the first ionisation energies for several elements in Group 2.
(a)[1]
Write the equation for the first ionisation energy of Mg. Include state symbols.
(b)[3]
Explain the pattern seen in first ionisation energies down Group 2.
(c)[2]
The second ionisation energy of Be is $1757\ \text{kJ mol}^{-1}$. Explain why the second ionisation energy of Be is higher than the first ionisation energy of Be.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$\mathrm{Mg(g) \rightarrow Mg^+(g) + e^-}$” …