Chemistry A-Level
Group 17 trends
What Group 17 trends means in Chemistry A-Level, as defined for OCR.
Definition of Group 17 trends
Check what you remember
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Reference: OCR
The larger radius and greater shielding outweigh the rising nuclear charge, so the tendency to form a 1⁻ ion decreases and reactivity falls.
Topics that use Group 17 trends
- The halogens (OCR A-Level)
Related terms
- Ammonia solubility as a confirmatory test
- atomic radius
- Benefits versus risks
- Diatomic molecular structure of halogens
- Displacement reactions of halogens with halide ions
- Disproportionation
- Disproportionation of chlorine
- Electron shielding
Using Group 17 trends in the exam
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