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Biology Chepter 2
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Matter
anything that takes up space
Element
sustance that cannot be broken down into other
substences
Compound
consisting of two or more different elements in a fixed ratio-
characteristics different than the indivigual element
Essential Elements
things that an organism needs to live healthfuly and to reproduce- oxygen, carbon,
hydrogen, nitrogen ect.
Trace Elements
elements only needed in minute quantities
Atomic Number
number of protons
Author
Anonymous
ID
101888
Card Set
Biology Chepter 2
Description
chem basics
Updated
2011-09-15T13:41:45Z
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