Sodium reacts with both fluorine and chlorine.
The reaction between sodium and fluorine is extremely violent, whereas the reaction between sodium and chlorine is vigorous but less violent.
Figure 1 shows the electronic configurations of fluorine and chlorine atoms.

Explain, in terms of their electronic configurations, why fluorine reacts with sodium more violently than chlorine reacts with sodium.
Practise Edexcel GCSE Chemistry Group 7 with exam-style questions for Foundation and Higher tier. 87 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.