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AP Bio - 1 - Chapter 2 Vocab
"Biology" Seventh Edition Benjamin-Cummings Publishing Chapter 2-3
11
Biology
11th Grade
02/26/2009

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Term
Acid
Definition
A substance that increases the hydrogen ion concentration of a solution.
Term
Adhesion
Definition
The attraction between different kinds of molecules.
Term
Atom
Definition
The smallest unit of matter that retains the properties of an element.
Term
Base
Definition
A substance that reduces the hydrogen ion concentration of a solution.
Term
Balanced Chemical Equation
Definition
A chemical equation in which there are equal numbers of each type of atom in the reactants and products.
Term
Buffer
Definition
A substance that consists of acid and base forms in a solution and that minimizes changes in the pH when extraneous acids or bases are added to the solution.
Term
Chemical Bond
Definition
An attraction between two atoms, resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms. The bonded atoms gain complete outer electron shells.
Term
Chemical Equation
Definition
A representation of a chemical reaction, showing the relative numbers of reactant and product molecules.
Term
Chemical Reaction
Definition
A process leading to chemical changes in matter; involves the making and/or breaking of chemical bonds.
Term
Cohesion
Definition
The binding together of like molecules, often by hydrogen bonds.
Term
Compound
Definition
A substance consisting of two or more elements in a fixed ratio.
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