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Chemistry of Life
biology
16
Biology
10th Grade
09/24/2008

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Term
nucleus
Definition
center of the atom
Term
electron
Definition
negativley charged particle
Term

compound

 

Definition
substance formed by chemical combination of 2 or more elements
Term
isotopes
Definition
atoms of the same electrons that differ in #s of nuetrons
Term
covalent bond
Definition
electrons shared between atoms
Term
molecule
Definition
SMALLEST UNIT OF MOST COMPOUNDS
Term
ionic bond
Definition
formed when  1 or more electrons are transferred from one atom to another
Term
ions
Definition

+ and - charged atoms

Term
van der waals forces
Definition
molecules are close together attraction developes between oppostie molecules
Term
cohesion
Definition
attraction between molecules of the same substance
Term
adhesion
Definition
attraction between differnt substances
Term
mixture
Definition
composed of two or more elemtns physicially mixed
Term
buffers
Definition
weak acids
Term
acid
Definition
compound produces hydrooxide ions
Term
suspensions
Definition
mixture of waters and nondissolved materials
Term
atom
Definition
basic unit of matter
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