The mass number of Fe raised to the 2 plus power is 56 How many neutrons are there in a single Fe raised to the 2 plus power atom?

Iron (Fe) has an atomic number of 26, so it contains 26 protons. The number of neutrons is the mass number minus the number of protons: 56 − 26 = 30. The 2+ charge means the atom has lost electrons; it does not change the number of neutrons. The correct choice is 30.

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