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CHM 103 (ch. 1-3)
Tro
13
Chemistry
Undergraduate 1
02/17/2011

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Term
chemistry
Definition
the science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules
Term
scientific law
Definition
brief statement that summarizes past observations and predicts future ones
Term
scientific theory
Definition
a model for the way nature is and tries to explain not merely what nature does but why
Term
matter
Definition
anything that occupies space and has mass
Term
energy
Definition
capacity to do work
Term
kinetic energy
Definition
energy associated with motion
Term
potential energy
Definition
energy associated with position or composition
Term
thermal energy
Definition
energy associated with the temperature of an object
Term
law of conservation of mass
Definition
in a chemical reaction, matter is neither created nor destroyed
Term
law of multiple proportions
Definition
John Dalton

when two elements (A & B) form two different compounds, the masses of element B that combine with 1g of element A can be expressed as a ratio of small whole numbers
Term
radioactivity
Definition
the emission of small energetic particles from the core of certain unstable atoms
Term
periodic law
Definition
when the elements are arranged in order of increasing mass, certain sets of properties recur periodically
Term
molar mass
Definition
the value of an element's molar mass in grams per mole is numerically equal to the element's atomic mass in atomic mass units
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