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.

Remove ads
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

Biology Ch. 2

Chemistry of Life

acid any compound that increases the number of hydronium ions when dissolved in water
activation energy the minimum amount of energy required to start a chemical reaction
adhesion the attractive force between two bodies of different substances that are in contact with each other
aqueous solution a solution in which water is the solvent
atom the smallest unit of an element that maintains the chemical properties of that element
atomic number the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element
base any compound that increases the number of hydroxide ions when dissolved in water
buffer a solution made from a weak acid and its conjugate base that neutralized small amounts of acids or bases added to it
capillarity the attraction between molecules that results in the rise of a liquid in small tubes
catalysis the acceleration of a chemical reaction by a catalyst
chemical bond the attractive force that holds atoms or ions together
chemical reaction the process by which one or more substances change to produce one or more different substances
cohesion the force that holds molecules of a single material together
compound a substance made up of atoms of two or more different elements joined by chemical bonds
concentration the amount of a particular substance in a given quantity of a mixture, solution, or ore
covalent bond a bond formed when atoms share one or more pairs of electrons
electron a subatomic particle that has a negative charge
element a substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number
energy the capacity to do work
enzyme a molecule, either protein or RNA, that acts as a catalyst in biochemical reactions
hydrogen bond the intermolecular force occurring when a hydrogen atom that is bonded to a highly electronegative atom of one molecule is attracted to two unshared electrons of another molecule
hydronium ion an ion consisting of a proton combined with a molecule of water; H3O+
hydroxide ion the OH- ion
ion an atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge
ionic bond the attractive force between oppositely charged ions, which form when electrons are transferred from one atom to another
isotope an atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons
mass a measure of the amount of matter in an object; a fundamental property of an object that is not affected by the forces that act on the object, such as the gravitational force
mass number the sum of the numbers of protons and neutrons in the nucleus of an atom
matter anything that has mass and takes up space
metabolism the sum of all chemical processes that occur in an organism
molecule a group of atoms that are held together by chemical forces
neutron a subatomic particle that has no charge and that is located in the nucleus of an atom
nucleus in physical science an atom's central region, which is made up of protons and neutrons
orbital a region in an atom where there is a high probability of finding electrons
oxidation reaction a chemical reaction in which a reactant loses one or more electrons such that the reactant becomes more positive in charge
pH scale a range of values that are used to express the acidity or alkalinity of a system; 1-6=acidic, 7=neutral, 8-14=alkaline
polar describes a molecule in which the positive and negative charges are separated
product a substance that forms in a chemical reaction
poton a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number of protons in the nucleus is the atomic number, which determines the identity of an element
reactant a substance that participates in a chemical reaction
redox reaction a reaction in which electrons are transferred between atoms; also known as an oxidation-reduction reaction
reduction reaction a chemical change in which electrons are gained, either by the removal of oxygen, the addition of hydrogen, or the addition of electrons
saturated solution a solution that cannot dissolve any more solute under the given conditions
solute in a solution, the substance that dissolves in the solvent
solution a homogeneous mixture throughout which two or more substances are uniformly dispered
solvent in a solution, the substance in which the solute dissolves
Created by: alicemb00