BRAINCAKEGroup 7 Elements
Group 7 elements are called The Halogens. They are all diatomic molecules and the melting temperature increases down the group. When two molecules are close together they experience London forces (instantaneous dipole-induced dipole forces). As you go down the group there are more electrons so there are stronger London forces and the melting point increases.
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Key terms in this lesson
- london forces
- Weak intermolecular forces caused by instantaneous dipoles inducing dipoles in neighbouring molecules, present between all molecules.
More in Group 7
- Trends in Melting and Boiling Temperature
- Trend in Electronegativity
- Trend in Reactivity
- Reactions with Group 1 and 2 Metals
- Halogen-Halide Displacement Reactions
- Halogen Disproportionation Reactions
- Reaction of Halides with Sulfuric Acid
- Sodium Chloride
All 14 lessons in Group 7 · All Edexcel AS-level Chemistry topics