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What is the difference between an atom, compound, and mineral???????

Please help, Thanks


Atom= matter in the form of small units
Compound= elements chemically combined
Mineral= inorganic nutrients that regulate many chemicals in the body

for definition of mineral see below

http://en.wikipedia.org/wiki/Mineral

last yearmy school librarian said that wikipedia is an unrealiable source b/c ANYONE can put info on it, therefore, its not neccisarily true

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