Physics A-Level
Number of undecayed nuclei
What Number of undecayed nuclei means in Physics A-Level, as defined for OCR.
Definition of Number of undecayed nuclei
Check what you remember
Read the wording for your board, then hide it and explain Number of undecayed nuclei in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The actual count of nuclei present at that instant, to which activity is proportional.
Topics that use Number of undecayed nuclei
- Radioactivity (OCR A-Level)
Related terms
- Absorber
- Alpha decay
- Beta-minus decay
- Beta-plus decay
- Carbon-14 and half-life
- Corrected count rate
- Decay constant
- Experimental measurement of half-life
Using Number of undecayed nuclei in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge