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Science TTK
FINAL
| Term | Definition |
|---|---|
| covalent bond | a chemical bond formed when two atoms share one or more pairs of valence electrons. |
| synthesis | a type of chemical reaction in which two or more substances combine and form one compound. |
| decomposition | a type of chemical reaction in which one compound breaks down and forms two or more substances. |
| acid | a substance that produces a hydronium ion when dissolved in water. |
| base | a substance that produces hydroxide ions when dissolved in water |
| solution | another name for a homogeneous mixture. |
| indicator | a compound that changes color at different pH values when it reacts with acidic or basic solutions |
| solute | any substance in a solution other than the solvent |
| solvent | the substance that exists in the greatest quantity in a solution |
| dilute | |
| concentrated | the amount of a particular solute in a given amount of solution |
| OH- | a mathematical equation that describes the relationship between voltage, current, and resistance |
| chemical reaction | a process in which atoms of one or more substances rearrange to form one or more new substances |
| electron dot diagram | a model that represents valence electrons in an atom as dots around the element's chemical symbol |
| reactants | a starting substance in a chemical reaction |
| products | a substance produced by a chemical reaction |
| periodic table | a chart of the elements arranged into rows and columns according to their physical and chemical properties |
| atomic number | the number of protons in an atom of an element |
| atomic mass | the average mass of the element's isotopes, weighted according to the abundance of each isotope |
| ionic bond | the attraction between positively and negatively charged ions in an ionic compound |
| metallic bond | a bond formed when many metal atoms share their pooled valence electrons |
| molecule | two or more atoms that are held together by covalent bonds and act as a unit |
| amplitude | the maximum distance a wave varies from its rest position |
| electromagnetic wave | a transverse wave that can travel through empty space and through matter |
| interference | occurs when waves overlap and combine to form a new wave |
| reflection | the bouncing of a wave off a surface |
| refraction | the change in direction of a wave as it changes speed in moving from one medium to another |
| diffraction | the change in direction of a wave when it travels by the edge of an object or through an opening |
| insulator | |
| alternating current | an electric current that changes direction in a regular pattern |
| magnetic field | where the lines of force meet and cause magnets |
Created by:
2018grellerj
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