Edexcel GCSE Chemistry · 1CH0
Paper 1, Paper 2
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GCSE Chemistry · key term
The approximate distance from the centre of an atom to the extent of its electron cloud.
Used by Edexcel and OCR
Paper 1, Paper 2
Specification C1.2c · Paper 1 (Foundation), Paper 3 (Higher)
The distance from the centre of an atom to its outer edge.
Revise: Atomic DimensionsAn atomic radius is a measure of the distance from an atom's centre to its outer edge. A bond length is the distance between the nuclei of two atoms joined by a chemical bond.
Keep radius and diameter comparisons consistent. A typical atomic radius is about , whereas a typical nuclear radius is about .
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Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The approximate distance from an atom’s nucleus to the outer extent of its electron region.