Chemistry A-Level
electronegativity down a group
What electronegativity down a group means in Chemistry A-Level, as defined for AQA.
Definition of electronegativity down a group
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Reference: AQA
Falls from fluorine at 4.0 to iodine at 2.5, because the atom has more shells so the bonding pair lies further from the nucleus and is screened by more inner electrons.
Topics that use electronegativity down a group
- Trends in properties (AQA A-Level)
Related terms
- acidifying with nitric acid
- choice of acid
- concentrated sulfuric acid
- confirmation with ammonia
- confirming a halide
- dilute and concentrated ammonia
- displacement reactions
- ionic equations
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