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basic Chemistry
1
12
Biology
10th Grade
02/10/2009

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Term
Atom
Definition
Is the basic building block of the matter
Term
Neuitrons  
Definition
Neutral  charge
Term
protons
Definition
+ charge
Term

element

Definition
Are substances made entirely of same atom.
Term
Atomic Number
Definition
It tells the unite of positive charge  in the nucleus
Term
mass number
Definition
is virtually the entire weight of the atom.
Term
Molecall
Definition
The combinetion of two or more atomslor elements.
Term
compound
Definition
are two or more element compoud  definite propfions.
Term
mixture
Definition
isa combintion of substance that are physically  mixure.
Term

Homogeneous mixture

Definition
Have particles that are spread evenly through out.
Term
Heterogensous mixture
Definition
Have particles that to not spread out enly.
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