(a(i))[1]
Give the complete electronic configuration of a fluorine atom.
(a(ii))[1]
Deduce how many pairs of electrons are present in the second energy shell, $n = 2$, of an oxygen atom.
(a(iii))[1]
Draw the shape of the highest energy orbital that has electrons in a calcium atom.
(b(i))[1]
Write an equation that represents the first ionisation energy of sulfur.
(b(ii))[2]
Explain why sulfur’s first ionisation energy is lower than phosphorus’s first ionisation energy.
(b(iii))[4]
Put $\text{F}^-$, $\text{Ne}$ and $\text{Na}^+$ into order of increasing radius. Explain your reasoning.