This definitions covers Key Definitions within Radioactive Decay for GCSE Physics. Revise Radioactive Decay in Atomic Structure for GCSE Physics with 13 exam-style questions and 6 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 8 of 14 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
Topic position
Section 8 of 14
Practice
13 questions
Recall
6 flashcards
📖 Key Definitions
Radioactive decay: The spontaneous, random emission of radiation from an unstable nucleus as it becomes more stable.
Alpha particle (α): A particle consisting of 2 protons and 2 neutrons, emitted from heavy unstable nuclei.
Beta particle (β): A high-speed electron emitted from the nucleus when a neutron converts to a proton.
Gamma ray (γ): High-energy electromagnetic radiation emitted from a nucleus releasing excess energy.
Ionisation: The process of removing electrons from atoms, creating ions. Radiation causes ionisation as it passes through matter.