How does a metal atom combine with a halogen atom?

• Resources Structure
• Key Stage 4
• Chemistry
• IX. The periodic table and chemical properties of the elements
• 50. Reactions of the halogens

• Exam Specifications
• Key Stage 4
• AQA GCSE Science A (4461) Chemistry
• III. Additional materials
• 1. Additional materials
• Additional materials
• AQA GCSE Additional Science (4463) Chemistry
• I. Chemistry 2
• 1. How do sub-atomic particles help us to understand the structure of substances?
• The elements in Group 7 of the periodic table, the halogens, have similar chemical properties. They react with the alkali metals to form ionic compounds in which the halide ions have a single negative charge.
• AQA GCSE Chemistry (4421)
• II. Chemistry 2
• 16. How do sub-atomic particles help us to understand the structure of substances?
• The elements in Group 7 of the periodic table, the halogens, have similar chemical properties. They react with the alkali metals to form ionic compounds in which the halide ions have a single negative charge.
• III. Chemistry 3
• 22. How was the periodic table developed and how can it help us understand the reactions of elements?
• A more reactive halogen can displace a less reactive halogen from an aqueous solution of its salt.
• The elements in Group 7 of the periodic table (known as halogens): − have coloured vapours − consist of molecules which are made up of pairs of atoms − form ionic salts − form molecular compounds with other non-metallic elements.
• In Group 7, the further down the group an element is: − the less reactive the element − the higher its melting point and boiling point.

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