To determine the correct numbers of subatomic particles for one atom of iron (Fe), we can use the information provided:
- The atomic number of iron (Fe) is 26, which means it has 26 protons and, in a neutral atom, also 26 electrons.
- The atomic weight of iron is approximately 55.847. The number of neutrons can be calculated by subtracting the number of protons from the atomic mass (rounded to the nearest whole number):
\[ \text{Number of neutrons} = \text{Atomic mass} - \text{Number of protons} \approx 56 - 26 = 30 \]
Therefore, an atom of iron has:
- 26 electrons
- 26 protons
- 30 neutrons
So the correct response is:
One atom of iron would have 26 electrons, 26 protons, and 30 neutrons.