An isotope of the element Manganese (Mn) has an atomic number of 25 and a mass number of 55. Assuming the atom is neutral, this means it has
A) 55 protons, 55 electrons, and 25 neutrons
B) 25 protons, 25 electrons, and 30 neutrons
C) 25 protons, 30 electrons, and 25 neutrons
D) 25 protons, 25 electrons, and 55 neutrons
B
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