1) What radio active particle is stopped by a piece of thin aluminium a) Beta b) Alpha c) Gamma 2) What device is used to detect ionising radiation a) Geiger-muller tube b) Galvanometer  3) What is Half-life a) How long it takes for the number of unstable nuclei to halve.  b) How radio active something is 4) What is an ion a) A positively charged constituent of the nucleus. b) Atoms with a resultant charge due to the loss or gain of electrons. 5) What is irradiation a) The number of protons and neutrons in an atom. b) Atoms with the same number of protons but different numbers of neutrons. c) A device used to detect ionising radiation. d) The process of an object being exposed to nuclear radiation. 6) What is Radioactive Contamination a) The random process involving a nuclei emitting radiation to become more stable b) A medical imaging device that uses radioactive tracers and detectors to form 7) What is radioactive decay a) Fission produces two smaller nuclei, two or three neutrons and gamma b) The random process involving unstable nuclei emitting radiation to

GCSE, Combined Science, Physics, JMc, OCR, Gateway, KS4, Foundation, Radioactivity

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