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Problem: How many protons, electrons, and neutrons are present in an atom of copper whose atomic number is 29 and whose mass number is 64?

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An element can be represented as:

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You can determine the identity of the element using its atomic number:

Atomic number (Z): 

 represents the identity of the element
 reveals the number of protons
 in a neutral element:

            # of protons = # of electrons

Mass number (A)

 reveals the number of protons and neutrons

            mass number = # of protons + # of neutrons


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Problem Details

How many protons, electrons, and neutrons are present in an atom of copper whose atomic number is 29 and whose mass number is 64?

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