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Chemistry

Chemistry study cards

TermDefinition
Endothermic Reaction Any chemical reaction that absorbs heat from its environment.
Exothermic reaction When energy is transferred to the surroundings
Solid An object that's molecules are very close together
Liquid An object that's molecules are slightly spread out
Gas An object that's molecules are spread out alot
Phase change When a object i going from one state of matter to another by adding or decreasing energy
Electron a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Radioactivity the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
Alpha particle a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
beta particle a fast-moving electron emitted by radioactive decay of substances. (The emission of beta particles was originally regarded as a ray.).
gamma ray penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.
periodic table of elements A chart of every single known element and its abbreviation
Element Lots of the same atoms grouped up together
Compound A compound is a material composed of two or more components. Water, carbon dioxide and table salt are some examples of compounds.
Created by: 122241418
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