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| molecule |
the smallest particle of a substance having all the characteristics of the substance |
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porkchoppony Thu, 05 Jun 2008 23:04:21 GMT |
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| _______ and ______ make up the nucleus of an atom |
protons neutrons |
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porkchoppony Thu, 05 Jun 2008 23:04:21 GMT |
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| what happens to the molecules of different substances when they react |
molecules break apart and recombine to form other things |
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porkchoppony Thu, 05 Jun 2008 22:57:27 GMT |
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| what is always produced from a chemical reaction |
a change |
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porkchoppony Thu, 05 Jun 2008 22:57:27 GMT |
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| what is a chemical reaction |
when a chemical changes becuase of another chemical |
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porkchoppony Thu, 05 Jun 2008 22:57:27 GMT |
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| mixture |
two or more substances that are mixed together but are not chemically combind |
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porkchoppony Thu, 05 Jun 2008 22:57:27 GMT |
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| pure substance |
a substance that is chemically bonded together or an indivule element |
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porkchoppony Thu, 05 Jun 2008 22:55:19 GMT |
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| compound |
a pure stubstance made of 2+ atoms that are chemically combined |
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porkchoppony Thu, 05 Jun 2008 23:21:47 GMT |
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| element |
a pure substance that cannot be broken down into other substances there are just over 100 known elements |
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porkchoppony Thu, 05 Jun 2008 22:55:19 GMT |
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| atom |
the smallest complete piece of an element all matter is made up of atoms |
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porkchoppony Thu, 05 Jun 2008 22:55:19 GMT |
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| the atomic mass of lead (Pb) is __________ which means that one ______ of lead has a mass of __________ amu. |
207.2 atom 207.2 |
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porkchoppony Thu, 05 Jun 2008 22:53:04 GMT |
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| the ______ ________ assigned to each element on the periodic table is the number of __________ in its _________ |
atomic number protons neucleus |
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porkchoppony Thu, 05 Jun 2008 22:53:04 GMT |
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| the three parts of an atom are called _________,_____,and ________. |
neutron proton electron |
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porkchoppony Thu, 05 Jun 2008 22:53:03 GMT |
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| an element and combination of elements chemically bonded together are called __________ ________ |
pure substances |
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porkchoppony Thu, 05 Jun 2008 22:53:03 GMT |
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