Key term for Edexcel GCSE Physics, used in Half-life.
Unstable atomic nuclei in a radioactive sample that have not yet emitted radiation to become stable.
Undecayed nuclei appears in Edexcel GCSE Physics revision content for Radioactivity, especially Half-life and Half-life Definition.
Create a free account to access Edexcel GCSE Physics revision notes, track progress, and practise related key terms.
