Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

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




share
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

Ch. 8 Reactions

DefinitionTerm
A substance that enters into a chemical reaction . Always on the left side of the arrow. reactant
A substance that is produced by a chemical reaction. Always on the right side of the arrow. product
Expression in which symbols, formulas, and numbers are used to represent a chemical reaction. chemical equation
The observation that mass remains constant in a chemical reaction. law of conservation of mass
Two or more simple substances combine to form a new complex substance. synthesis reaction
A complex substance breaks down into two or more simpler substances. decomposition reaction
An uncombined element replaces an element that is part of a compound. single replacement reaction
Different atoms in two different compounds replace each other. double replacement reaction
A chemical reaction in which energy is released. exothermic
A chemical reaction in which energy is absorbed. endothermic
Energy required to start a reaction. activation energy
The study of reaction rates. kinetics
Measure of how quickly reactants turn in products. reaction rate
Relates collisions among particles to reaction rate. Reaction rate depends on such factors as concentration, surface area, temperature, and catalysts. collision theory
Refers to how much of the material is exposed surface area
Increases the rate of a reaction, but does not change itself. catalyst
The number placed in front of the symbol or formula in a chemical equation that indicates the number of atoms or molecules involved in the reaction. This is used to balance an equation. Coefficient
Number placed in the lower right of the chemical symbol to indicate the number of atoms of the element in the compound. Subscript
Combining of atoms and electrons to form new substances. This happens when electrons are gained, lost, or shared. Chemical Bond
Created by: tthomps