Which element has the highest second ionisation energy?
A
Na\text{Na}Na
B
Mg\text{Mg}Mg
C
K\text{K}K
D
Ca\text{Ca}Ca
Markscheme
Group 7(17), the halogens Questions
37 exam-style questions on AQA A Level Chemistry Group 7(17), the halogens, covering Trends in properties and Uses of chlorine and chlorate(I). Each one has a worked solution and a mark scheme showing where the marks go.