Physics A-Level
Technetium-99m
What Technetium-99m means in Physics A-Level, as defined for AQA.
Definition of Technetium-99m
Check what you remember
Read the wording for your board, then hide it and explain Technetium-99m in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A metastable excited state of technetium-99 that decays by gamma emission with a half-life of about six hours and is used as a medical tracer.
Topics that use Technetium-99m
- Nuclear instability (A-level only) (AQA A-Level)
Related terms
- Alpha emission
- Beta-minus decay
- Beta-plus decay
- Conservation laws
- Electron capture
- Gamma emission
- Nuclear equations
- Nuclear excited state
Using Technetium-99m 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