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.
Don't know
remaining cards
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:
restart all cards
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

Terms for Chapter 2

Atom The smallest unit of an element that maintains the chemical properties of that element
Element A substance that cannot be separated or broken down into simpler substances by chemical means; have same atomic #
Compund A substance made up of atoms of two or more different elements joined by chemical bonds.
Ion An atom, radical, or molecule that has gained or lost one or more electrons and has a positive or negative charge.
Ionic Bond The attractive force between oppositely charged ions, which form when electrons are transferred from one atom to another.
Covalent Bond Chemical bond formed when two atoms share one or more pairs of electrons.
Hydrogen Bond
Cohesion Attraction between molecules of the same substance.
Adhesion Attraction between molecules of different substances.
Acid Compound that donates a proton (H+) when dissolved in a solution.
Base Compound that accepts a proton (H+) when dissolved in solution.
Carbohydrate Molecule composed of carbon, hydrogen, and oxygen; includes sugars and starches.
Fatty Acid
Amino Acid Molecule that makes up proteins; composed of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
Nucleic Acid
Chemical Reaction Process by which substances change into different substances through the breaking and forming of chemical bonds.
Bond Energy Amount of energy needed to break a bond between two particular atoms; or the amount of energy released when a bond forms between two particular atoms.
Activation Energy Energy input necessary to initiate a chemical reaction.
Endothermic Chemical reaction that requires a net input of energy.
Catalyst Substance that decreases activation energy and increases reaction rate in a chemical reaction.
Enzyme Protein that catalyzes chemical reactions for organisms