Give complete symbols of each atom, including the atomic number and the mass number. a. A magnesium

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Give complete symbols of each atom, including the atomic number and the mass number.
a. A magnesium atom with 12 protons and 12 neutrons
b. A magnesium atom with 12 protons and 13 neutrons
c. A xenon atom with 54 protons and 77 neutrons
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