Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

chemical reaction


chemistry is the study if properties of matter and how matter changes
element is a substance that cannot be broken down into any other substances by chemical or chemical means
compound is a substance made of two or more elements chemically combined in a specific ration or proportion
mixture is made of two or more pure substances elements compounds or both that are in the same place but not combined as a new material
solution is a well mixed mixture
physical change a change that alter the form or appearance of material
chemical change a change in matter that produces new sub stance
precipitate a solid that forms from solution during a chemical reaction
atom the smallest particle of an element
molecule is the combination of two or more atoms
chemical bond the force that holds atoms together
chemical equation is a shorter easier way to show chemical reactions using symbol instead of words
symbol most elements a represented by a one-letter or two letter
chemical formula a compound is represented by a word
subscript show the number of atoms of an element in a molecule
reactants the materials you have at the beginning of a chemical reaction
products when the reaction is complete you have different materials
coefficient is a number in front of a chemical formula in the equation
synthesis when two or more substances combined to make a more complex substance
replacement reaction a reaction in which one element replaces another in a compound or in which two elements in different compounds trade places
exothermic reaction a reaction that releases energy in the form of heat
activation energy is the minimum amount of energy that has to be added to start a reaction
concentration is the amount of one material in a given volume of another material
catalyst is a material that increases the rate of a reaction by lowering the activation energy
enzymes provide a surface on which reactions take place
inhibitor a material used to decrease the rate of a reaction
combustion is a rapid reaction between oxygen and a substance called a fuel
fuel is a material that releases energy when it burns
Created by: killer1



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards