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Manganese
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Manganese is a chemical element; it has the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. First isolated in the 1770s, mangane
Pure manganese cube and oxidized manganese chips
Pure manganese cube and oxidized manganese chips
Manganese(II) chloride crystals – the pale pink color of Mn(II) salts is due to a spin-forbidden 3d transition.
Manganese(II) chloride crystals – the pale pink color of Mn(II) salts is due to a spin-forbidden 3d transition.
Aqueous solution of KMnO4 illustrating the deep purple of Mn(VII) as it occurs in permanganate
Aqueous solution of KMnO4 illustrating the deep purple of Mn(VII) as it occurs in permanganate
Some of the cave paintings in Lascaux, France, use manganese-based pigments.
Some of the cave paintings in Lascaux, France, use manganese-based pigments.
Magnesium
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Magnesium is a chemical element; it has symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point, and high chemical reactivity. Like the other alkaline earth me
Manganese
…manganese (German: Mangan). The name magnesia was eventually used to refer only to the white magnesia alba (magnesium oxide), which provided the name magnesium for the free element when it was isolated much later. Manganese dioxide, which is abundant in nature, has long been used as a pigment. The cave paintings…
CSIRO Science Image 2893 Crystalised magnesium
CSIRO Science Image 2893 Crystalised magnesium
Magnesium is brittle, and fractures along shear bands when its thickness is reduced by only 10% by cold rolling (top). However, after alloying Mg with
Magnesium is brittle, and fractures along shear bands when its thickness is reduced by only 10% by cold rolling (top). However, after alloying Mg with 1% Al and 0.1% Ca, its thickness could be reduced by 54% using the same process (bottom).
Magnesium sheets and ingots
Magnesium sheets and ingots
An Iranian worker tends to the Pidgeon process
An Iranian worker tends to the Pidgeon process