chemistry part 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| activation energy | what is needed to start a chemical reaction
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| arrow | means yeild
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| characteristics of a chemical reaction | changes in or changes in properties
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| chemical changes | alter the chemical properties of matter new substaces with new properties are formed
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| chemical equations | a shorter easier way to show chemical reactions by using symbols instead of words
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| coefficent | a number placed in front of a chemical formula in a equations tells how many atoms or moluclues of each reactant
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| conversation of mass | the amount of matter involved in a chemical reaction does not change the total mass of the reactants must equal the total mass
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| decomposition reaction | a compound breaks down into simpler substaces
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| endothermic reaction | an observable change in energy that shows a chemical reaction took place a reaction that takes heat from the solution
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| physical change | alter only the physical properties of matter no new substances are formed can be in any sized
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| preciptate | a solid that forms solution during a chemical reaction observable change that took place
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| products | the materials you have after a chemical reaction written on the right side of the formula
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| reactants | the materials you have at the being of the chemical reaction
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| replacement reactants | one part of a compound is displaced by an element or compound from another substace
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| states of matter | solid liquid gas
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| subscripts | show the number of atoms or an element in a molecloue
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| synthesis reaction | 2 substances combine to form a new compound
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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