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Use the provided figure to answer the question below.

26
Fe
Iron
55.847

Using the information from the Periodic Table of Elements, identify the correct numbers of subatomic particles for one atom of iron?

(1 point)
Responses

One atom of iron would have 26 electrons, 26 protons, and 30 neutrons.
One atom of iron would have 26 electrons, 26 protons, and 30 neutrons.

One atom of iron would have 26 electrons, 26 protons, and 55 neutrons.
One atom of iron would have 26 electrons, 26 protons, and 55 neutrons.

One atom of iron would have 26 electrons, 26 protons, and 26 neutrons.
One atom of iron would have 26 electrons, 26 protons, and 26 neutrons.

One atom of iron would have 55 electrons, 55 protons, and 26 neutrons.

1 answer

To determine the number of subatomic particles in an atom of iron (Fe), we can use the atomic number and the atomic mass.

  1. The atomic number of iron (26) indicates that it has 26 protons.
  2. In a neutral atom, the number of electrons is equal to the number of protons, so iron has 26 electrons.
  3. To find the number of neutrons, we subtract the atomic number from the atomic mass (rounded to the nearest whole number). The atomic mass of iron is approximately 55.847, which we round to 56 for calculation purposes.

Number of neutrons = Atomic mass - Number of protons Number of neutrons = 56 - 26 = 30

Thus, one atom of iron would have:

  • 26 electrons
  • 26 protons
  • 30 neutrons

So, the correct answer is: One atom of iron would have 26 electrons, 26 protons, and 30 neutrons.