Part of the giant ionic lattice structure of sodium fluoride is shown in Figure 1.

Sodium fluoride has a melting point of 993∘C993^{\circ}\text{C}993∘C.
Explain why sodium fluoride has a high melting point.
Practise Edexcel GCSE Chemistry Ionic bonding with exam-style questions for Foundation and Higher tier. 42 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.