Atomic Structure and Isotopes Test
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7 Terms
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Which subatomic particle is responsible for identity of an element?
Proton
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The atomic number of an element is equal to the number of.
Protons
3
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The atomic mass of an element is determind by the sum (total) of:
Protons and Neutrons
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Which subatomic particles carries a negative charge?
Electron
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Which is a average of all the isotopes for an element?
Atomic mass
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What are the mass number are equal to?
Number of Protons and Neutrons
Note 
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