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Chemistry
Chemistry study cards
Term | Definition |
---|---|
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. |