Talk:A-level Physics/Forces, Fields and Energy/Radioactivity

Specification
From the OCR GCE Physics A specification. Tick with &#10004; when you feel each part of the specification has been covered. Try not to add much more than what is in this list as it would not appear in the exam anyway. Use links to wikipedia for more depth in a topic.


 * 1) appreciate the spontaneous and random nature of radioactive decay of unstable nuclei. &#10004;
 * 2) describe the nature, penetration and range of α-particles, β-particles and γ-rays as different types of ionising radiation. &#10004;
 * 3) represent radioactive decay by nuclear equations. &#10004;
 * 4) show an awareness of the hazards of ionising radiation and the safety precautions which should be taken in the handling, storage and disposal of radioactive materials. &#10004;
 * 5) define the terms activity and decay constant. &#10004;
 * 6) recall and use A = λN. &#10004;
 * 7) recognise, use and represent graphically solutions of the decay law bases on x = x0e -λt for activity, number of undecayed nuclei and corrected count rate. &#10004;
 * 8) define half-life as the mean time for the number of nuclei of a nuclide to halve. &#10004;
 * 9) use the relation λt½ = 0.693. &#10004;

spontaneity of a radioactive nucleus implies that it is not affected by environmental conditions such as temperature or pressure.