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| an element found in group 1 of the periodic table. alkali metals include lithium, sodium and potassium |
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| a substance that turns universal indicator paper blue and has a pH greater than 7 |
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| a mixture of metals or non-metals |
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| to study a substance carefully to find out which chemicals it contains |
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| analytical tests are experimenmts to find out which chemicals a susbtance contains. the results of these tests are called analytical data |
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| the number of protons in an element. the smaller number of the two |
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| the smallest part of an element |
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| a chemical join between two atoms |
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| a chemical change in which new substances are formed but there is no change in the number of atoms of each element |
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| a code for an element consisting of one, two or three letters |
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| two or more different elements chemically joined together |
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| the chemical reaction between a metal and air or water |
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| a molecule made of two atoms |
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| a reaction where a more reactive substnace replaces a less reactive one |
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| able to be pulled into thin wires |
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| a very small negatively charged particle found around the nucleus of an atom |
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| a substance made of only one type of atom |
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| a reaction in which energy is taken it. the reaction gets colder |
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| a reaction in which energy is given out. the reaction gets hotter |
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| a test to find out which metals are present in a substance |
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| the code for a substance showing which elements are present |
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| a vertical column on the periodic table containing elements that react in similar ways |
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| an element found in group 7, for example fluorine, chlorine and bromine |
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| can be bent or hammered into shape |
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| a particle made by chemically bonding two or more atoms |
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| a particle found in the nucleus of an atom. it has no charge |
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| an element found in group 8 (or 0), for example helium, neon and argon |
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| a row on the periodic table |
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| a solid that is formed when two solutions are reacted together |
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| postively charged particle fouiund in the nucleus |
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| iron oxide - formed when oxygen reacts with iron |
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| a solid that sinks to the bottom of a liquid without dissolving |
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| the mixture formed when a substance dissolves in a liquid |
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| kill microorganisms such as bacteria |
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| a solid mixed evenly with a liquid without dissolving |
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| an element found in the centr of the periodic table, for example, gold, iron and copper |
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