OCR GCSE Chemistry A · J248
Specification C4.1a · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Group PropertiesGroup 1 metals also react with oxygen to form oxides and with halogens to form salts called metal halides.
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GCSE Chemistry · key term
A compound containing a halogen combined with another element; examples include sodium chloride and potassium bromide.
Used by OCR
Specification C4.1a · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Group PropertiesGroup 1 metals also react with oxygen to form oxides and with halogens to form salts called metal halides.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A compound formed when a halogen combines with another element, such as sodium chloride.
Revise: Group 7 propertiesHalogens react with Group 1 metals to produce metal halides.
In a displacement question, compare the two halogens: a more reactive halogen displaces a less reactive halogen from a halide solution. If it is less reactive, state that there is no reaction.
In a displacement reaction, compare the free halogen with the halogen in the metal halide. A more reactive halogen displaces a less reactive one, not the reverse.
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