Assume that each iron atom has a permanent magnetic moment equal to 2 Bohr magnetrons (1 Bohr magnetos \[=9.27\times {{10}^{-24}}\,A-{{m}^{2}}\]). The density of atoms in iron is \[8.52\times {{10}^{28}}\,atoms/{{m}^{3}}.\]Find the maximum magnetic moment per unit volume.

• A. \[1.5\times {{10}^{2}}\,A/m\]
• B. \[1.58\times {{10}^{6}}\,A/m\]
• C. \[1.2\times {{10}^{5}}\,A/m\]
• D. \[1.3\times {{10}^{6}}\,A/m\]