Alpha particle - A positively charged particle consisting of two protons and two neutrons. They are highly ionising, but can be stopped by a few centimetres of air., Beta particle - A high speed electron that a nucleus emits when a neutron converts into a proton. They are ionising but can be stopped by a thin sheet of aluminium., Gamma Ray - Electromagnetic radiation emitted from a nucleus. They have a very high penetrating power and require several centimetre of lead to absorb them., Half-life - The time it takes for the number of unstable nuclei of an isotope in a sample to halve, or the time it takes for the initial count rate of a sample of the isotope to halve., Ions - Atoms with a resultant charge due to the loss or gain of electrons., Irradiation - The process of an object being exposed to nuclear radiation. The object doesn’t become radioactive., Nuclear Fission - The splitting of a large and unstable nucleus into two smaller and more stable nuclei to produce energy. This is the method currently used in nuclear power stations., Nuclear Fussion - The joining of two small, light nuclei to form a larger, heavier one and release energy. It cannot happen at low pressures and temperatures since in these conditions the electrostatic repulsion of protons in the nucleus cannot be overcome., Positive Ions - Atoms that have lost electrons and so have a resultant positive charge., Protons - A positively charged constituent of the nucleus., Radioactive Contamination - The unwanted presence of radioactive atoms on other materials. It is hazardous due to the decay of the contaminating atoms., Radioactive Decay - The random process involving unstable nuclei emitting radiation to become more stable., Isotopes - Atoms with the same number of protons but different numbers of neutrons. The atomic number is the same, but the mass number is different., PET Scanner - A medical imaging device that uses radioactive tracers and detectors to form internal body images., Geiger-Muller Tube - A device used to detect ionising radiation.,

Radioactivity P6 OCR

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?