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Word |
Definition |
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adhesion |
the force or attraction that holds two separate objects together. |
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alloy |
a mixture of metals |
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anion |
an ion with a negative charge. |
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atom |
The smallest particle of an element. |
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atomic mass/weight |
the total number of protons and neutrons in an atom. |
|
atomic number |
the number of protons in the nucleus of an atom as well as the number of electrons in a neutral atom. |
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boiling point |
temperature at which a liquid changes to a gas. |
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brittleness |
the property of matter that is how easily the substance breaks or shatters when force is applied to it. |
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catalyst |
a substance that helps along a chemical reaction or change without being changed itself. |
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cation |
an ion with a positive charge. |
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chemical bonds |
the process by which atoms combine to form molecules. |
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chemistry |
The science of matter and the changes in matter. |
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cohesion |
the attraction that holds together the molecules within one substance. |
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colloid |
a mixture in which the substance is split into tiny particles and spread within a second substance.Examples include smoke and fog. |
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compound |
a substance made up of two or more elements that are combined chemically. |
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concentration |
the amount of a solvent compared to the solute in a solution. |
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contract |
to become smaller, closer together |
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density |
thickness of a substance |
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diffusion |
when a substance spreads out within another substance as when a solute spreads out within a solvent in a solution, sometimes unevenly. |
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dissociation |
separation of a substance into atoms or ions. |
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ductility |
property of a metal in which it can be stretched without breaking. |
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elasticity |
the ability of a substance to be stretched and then to return to its original shape. |
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electricity |
a form of energy coming from charges. |
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electron |
a particle of the atom that has a negative charge. The electron is not a part of the nucleus, but moves around in an orbit around the nucleus. |
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element |
a substance made of one kind of atom that cannot be broken down chemically. |
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endothermic reaction |
When heat is given off curing a chemical reaction. |
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energy |
the ability to do work or make change. |
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evaporation |
changing of a liquid to a vapor at any temperature below its boiling point. |
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exothermic reaction |
When heat is absorbed during a chemical reaction. |
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formula |
tells what chemicals a compound is made up of |
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hardness |
property of matter that determines how easily the substance can be scratched. |
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heat |
a form of energy marked by differences in temperatures |
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inorganic chemistry |
the study of chemical elements and compounds except for carbon. |
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ion |
an atom or group of atoms that have a net electrical charge |
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isotope |
atoms with the same number of protons, but different numbers of neutrons. |
|
light |
visible electromagnetic radiation |
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liquie |
a state of matter that has a definite size or volume but not a definite shape. |
|
malleability |
the property of a metal that allows it to be hammered, rolled, pressed or forged. |
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melting point |
the temperature at which a substance changes from a solid to a liquid. |
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mixture |
several substances put together that can be easily separated by physical means. |
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molecule |
the smallest particle of a substance that still is that substance. |
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nucleus |
the center of the atom consisting of the proton and neutron. |
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neutron |
a particle in the center of the atom with no charge. |
|
organic chemistry |
the study of the compounds of carbon. |
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periodic table |
A chart of all the elements arranged by atomic number. |
|
periodic table |
chart of the elements arranged in columns and rows according to the increasing atomic numbers. |
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property |
a characteristic of matter such as color, density, brittleness, etc.. |
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proton |
a particle in the center of the atom that has a positive charge. |
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radioactivity |
the breakdown or decay of the nucleus of an atom by by the emission or giving off of particles. |
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solution |
a mixture of two or more in which two or more materials are dissolved in another material. |
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sound |
a disturbance that travels through air, land, water that can be heard. |
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sublimation |
the changing of a gas directly to a solid. |
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suspension |
similar to a solution, but the particles within the suspension can be seen by the naked eye. |
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temperature |
measure of how warm or cold a substance is. |
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tensile strength |
the resistance of a substance to any force used to tear it apart. |
