Chemistry Vocabulary
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| 994417907 | chemistry | the study of the properties of matter and how matter changes | 0 | |
| 994417908 | matter | anything that has mass and takes up space | 1 | |
| 994417909 | physical property | a characteristic of a pure substance that can be observed without changing into another substance | 2 | |
| 994417910 | chemical property | a characteristic of a pure substance that describes its ability to change into different substances | 3 | |
| 994417911 | element | a pure substance that cannot be broken down into any other substances by physical or chemical means | 4 | |
| 994417912 | compound | a pure substance made of two or more elements chemically combined in a set ratio | 5 | |
| 994417913 | mixture | made up of two or more substances that are together in the same place but are not chemically combined | 6 | |
| 1021276517 | atomic number | A unique number for each element that equals the number of protons in an atom of that element. | 7 | |
| 1021276518 | atomic mass | the average mass of an elements atoms, the total mass of both the protons and the neutrons of one atom. | 8 | |
| 1021276519 | atomic nucleus | The central part of an atom that contains both protons and neutrons. | 9 | |
| 1021276520 | protons | positively charged subatomic particles | 10 | |
| 1021276521 | neutrons | a subatomic particle that has no charge | 11 | |
| 1021276522 | electrons | negatively charged subatomic particles | 12 | |
| 1021276523 | period | horizontal row of elements | 13 | |
| 1021276524 | group | vertical column of elements | 14 | |
| 1021276525 | reactivity | the ease and speed with which an element combines or reacts with other elements. | 15 | |
| 1080092927 | ion | an atom or group of atoms that has an electric charge | 16 | |
| 1080092928 | polyatomic ion | ions made of more than one atom | 17 | |
| 1080092929 | ionic bond | attraction between two oppositely charged ions. | 18 | |
| 1080092930 | covalent bond | chemical bond formed where two atoms share electrons. | 19 | |
| 1093633364 | acid | proton donor with a pH lower than 7 | 20 | |
| 1093633365 | base | proton acceptor with a pH higher than 7 | 21 | |
| 1093633366 | water | this substance has a neutral pH of about 7 | 22 | |
| 1093633367 | pH scale | system used measure the ability of a substance to gain or lose a proton (H+) | 23 | |
| 1093633368 | conductivity | the ability of an object to transfer heat or electricity | 24 | |
| 1093633369 | reactant | A starting substance in a chemical reaction | 25 | |
| 1093633370 | product | An ending substance of a chemical reaction | 26 | |
| 1093633371 | electrolysis | the process of breaking chemical bonds with an electric current | 27 | |
| 1093633372 | oxidation | the addition of an oxygen atom or the subtraction of electrons during a chemical reaction | 28 | |
| 1093633373 | reduction | the subtraction of an oxygen atom or the addition of electrons during a chemical reaction | 29 | |
| 1093633374 | redox reaction | a reaction in which both reduction and oxidation take place | 30 | |
| 1093633375 | acid-base reaction | a reaction where an acid reacts with a base to produce water and a salt | 31 | |
| 1093633378 | surface tension | skin-like surface caused by the attraction of molecules at the surface of a liquid | 32 | |
| 1093633379 | polymer | a large, complex molecule built from a smaller molecule with a repeating pattern | 33 | |
| 1093633380 | monomer | the smaller molecule that builds into a polymer | 34 | |
| 1093658622 | combustion | A rapid reaction between oxygen and fuel that results in fire | 35 | |
| 1093658623 | volume | Amount of space occupied by an object | 36 | |
| 1093658624 | density | the amount of mass in a given space (density = mass/volume) | 37 | |
| 1093658625 | mass | the amount of matter in an object | 38 | |
| 1313722240 | atom | the smallest unit of an element that retains the chemical properties of that element. | 39 | |
| 1313722241 | molecule | two or more atoms held together by a chemical bond | 40 |
