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| The theory that all matter is made up of tiny particles that are in constant motion. |
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| A gas like mixture of positively charged particles. |
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| A charachteristic of matter causing it to expand when heated and contract when cooled. |
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| Water that contains high levels of unwanted materials |
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| The amount of energy needed to change a material from a liquid state to a gasous state. |
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| The amount of energy needed to change a material from a solid state to a liquid state. |
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| If a container of gas is made smaller, the pressure throughout the gas increases. |
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| Volume of a gas increases when temperature increases. |
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| Buoyant force that pushes up on an object in a fluid is equal to the weight of the fluid displaced by the object. |
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| as the velocity of a fluid increses, the pressure exerted by the fluid increases. |
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| Pressure applied to a fluid is transmitted evenly throughout that fluid. |
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| The amount of force exerted per unit of area; |
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| Matter that is an element or a compound |
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| Matter in which all the atoms are a like |
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| matter that is combonation of atoms of 2 or more elements. |
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| Substance made of elements or compounds that are stirred together, but not chemically combined. |
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| Mixture in which different materials are blended evenly so that the mixture is the same. |
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| Mixture in which different marerials are distributed unevenly so at any place in the mixture different combonations of material occur |
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| homogeneous mixture containing larger particles that do not settle & do not scatter light. |
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| heterogeneous mixture containing larger particles that eventually settle out. |
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| Heterogeneous mixture containg tiny particles. |
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| change in a substances size, shape, or state |
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| The change of 1 substance into abother substanceby changing their properties. |
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| A charachteristic of a substance that indicates whether it can under go a certain chemical change. |
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| Law of Conservation of Mass |
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| A law stating that the mass of all substances involved in a chemical change will be the same after the change. Matter is neither created nor destroyed during a chemical change. |
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| The Number of protons in an atoms nucleus |
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| It is the space where electrons most probably exist around the nucleous of an atom. |
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| 1/12 the mass of a carbon 12 atom. |
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| The positively charged center of the atom. |
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| Basic building blocks of matter. |
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| A shortened way to write the name of an element |
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| Total particles in an atoms nucleous |
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| The average atomic mass of all the isotopesof an element. |
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| 1 of 2 types of particles that occur in the nucleus of an atom. |
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| a negatively charged particle that orbits around the nucleous of an atom. |
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| A very small particle of matter that makes up protons and neutrons |
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| Periodic table of elements |
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| a table of the elements in order by increasing atomic numbers arranged in rows by their repeating properties. |
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| Diagram of an atom using the elements symbol with dots to show the electrons in the outer energy level |
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One of the 18 verticle columns in the Periodic Table of Elements.
Have the same number of electrons. |
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| Horizontal rows of elements in the P.T.E increasing from left to right is the number of electrons in the atoms outer shell. |
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Group 7A
Very reactive because they have 7 outer electrons. |
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| atoms of the elements that have differnet numbers of neutrons. |
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| An element having theses charachteristics:Shiny, ductile, good conductors of heat and electricity. |
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| An element having some properties of both a metal and a non metal and are semi conductors. |
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| An element having some properties of both a metal and a non-metal and are semi-conductors. |
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| The force that holds together atoms in a compound. |
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| A precise statement of the elements in a compound and their ration. |
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| Compounds that attack and destroy metals, human tissues, and other materials. |
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| A type of chemical bond formed by atoms when they share electrons. |
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| Compound that has water chemically attached to it. |
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| An atom that is either negatively or positively charged. |
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