Consider the situation when almost all of the magnetic moments of a sample of a particular ferromagnetic metal are aligned. in this case, the magnetic field can be calculated as the permeability constant μ0 multiplied by the magnetic moment per unit volume. in a sample of iron, for example, where the number density of atoms is approximately 8.50 ✕ 1028 atoms/m3, the magnetic field can reach 1.99 t. if each electron contributes a magnetic moment of 9.27 ✕ 10−24 a · m2 (1 bohr magneton), how many electrons per atom contribute to the saturated field of iron?