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13 cards from this deck
Protons, neutrons, and electrons
Positive
No charge (neutral)
Negative
Number of protons in an atom
Equals the number of protons
Positive protons cancel out negative electrons
Total number of protons +++ neutrons
Mass number −-− Atomic number
Use the atomic number
Same as number of protons
In the centre (nucleus)
In shells around the outside
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