![]() The molar magnetic susceptibility of magnesium is 1.68 x 10 -10 m 3mol -1 and that of manganese is 6.6475 x 10 -9 m 3mol -1. The resistivity of magnesium is 4.4 x 10 -8 Ωm and of manganese, it’s 1.6 x 10 -7 Ωm. The electrical conductivity of magnesium is 2.3 x 10 7 S/m and that of manganese is 6.2 x 10 5 S/m. The thermal expansion of magnesium is 24.8 x 10 -6 /☌ and that of manganese is 21.7 x 10 -6 /☌. Magnesium has a specific heat of 1.02 J/g.K while manganese has 0.479 J/g.K. The heat of vaporization for magnesium is 128 kJmol -1 and for manganese, it’s 220 kJmol -1. The heat of fusion of magnesium is 8.7 kJmol -1 and that of manganese is 13.2 kJmol -1. Magnesium has an atomic radius of 160 pm while manganese has 127 pm. The ionization potential for an atom of magnesium is 7.61 eV and for manganese, it is 7.40 eV. On the other hand, manganese, being a transition metal, has multiple oxidation states ranging from -3 to +7, although the most common are +2, +3, +4, +5, +6, and +7. Magnesium has 2 valence electrons in the 3s orbital and forms a +2 ion. Magnesium, 12Mg has an electronic configuration of 1s 2 2s 2 2p 6 3s 2 whereas manganese, 25Mn has an electronic configuration of 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 4s 2. ![]() Magnesium has an electronegativity of 1.31 and manganese has a value of 1.55 on Pauling’s scale. The melting and boiling points of manganese are 1242☌ and 2061☌. The melting and boiling points of magnesium are 650 ☌ and 1090 ☌. Magnesium has a density of 1.738 g/cm 3 and manganese has 7.21 g/cm 3. The relative atomic mass of magnesium is 24.3050 a.m.u while that of Manganese is 54.9380 a.m.u. The crystal structure of magnesium is hexagonal and close-packed whereas that of manganese is body-centered cubic. Manganese exists in the 7 th group and the 4 th period in the first transition series. Magnesium is present in group 2A and the 3 rd period in the periodic table. Manganese acts as a deoxidizing and alloying agent 1. ![]() The electron configuration of manganese is given as 3d 54s 2 Its electronegativity value is 1.31 Its electronegativity value is 1.55 Being a macro-mineral, it is needed in a larger amounts (350mg/day) for human bodies Manganese is a micromineral and is required in trace amounts (2.3mg/day) It is a representative element It is a transition metal Magnesium oxide (MgO), also known as magnesia, is the most common compound of magnesium One of most common compound of manganese is KMnO4, potassium permanganate Magnesium has a wide range of applications as a metal, especially in aircraft designing and automotive designing Manganese is used in the production of steel. ![]()
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