Iron has 26 protons, and one isotope of iron, ⁵⁷Fe, has an atomic mass of about 57. How many neutrons are in the nucleus of this atom? A) 31 B) 83 C) 26 D) 57

Question

Quizplus · Accepted Answer

The number of neutrons in an atom can be found by subtracting the number of protons from the atomic mass number. For iron (Fe) with an atomic mass of about 57 and 26 protons, the calculation is 57 - 26 = 31 neutrons.

Iron Has 26 Protons, and One Isotope of Iron, 57Fe

Iron Has 26 Protons, and One Isotope of Iron, ⁵⁷Fe