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Atomic Theory
4th unit
6
Chemistry
Not Applicable
12/12/2005
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Term
Electrons
 Definition
Carry a negative charge They are equal to protons Found in an outer region if an atom where they form what amounts to a cloud of negative charge.
Term
Atomic Number
 Definition
Number of protons and electrons In a neutral atom, protons and electrons are the same
Term
Neutrons
 Definition
Neutral charge In the nucleus
Term
Nuclear symbol
 Definition
Mass number (top), Atomic number (bottom) Element symbol
Term
Protons
 Definition
Positively charged Cancel out electrons Found in the nucleus
Term
Mass number
 Definition
protons + neutrons
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