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'''Manganese''' is an [[element]] in the "transition metals" class of the [[periodic table of the elements|periodic table]]. It is hard and brittle. It reacts (slowly) with water, and with acids.
'''Manganese''' is an [[element]] in the "transition metals" class of the [[periodic table of the elements|periodic table]]. It is hard and brittle. It reacts (slowly) with water, and with acids.
Manganese was discovered by [[Johann Gahn]] in 1774 by heating [[pyrolusite]] with [[charcoal]].
Manganese was discovered by [[Johann Gahn]] in 1774 by heating [[pyrolusite]] with [[charcoal]] in a blast furnace.
Manganese is used in small amounts to change the propeties of [[steel]] and other useful alloys.
Manganese is used in small amounts to change the propeties of [[steel]] and other useful alloys.
It is remarkable in all the other metals in that it is formed by the radioactive breakdown of magnesium isotopes, yet is still found in sufficient quantities to be useful in common, everyday processes and materials. Manganese is found in pyrolusite (magnesium) ore along with magnesium, and the two are seperated in a process similar to that of iron in a blast furnace, due to their significantly different melting points (one melts and is tapped off while the other remains solid; this is then melted and tapped off). It can also be found in pure manganese ore, where all the magnesium has decomposed. These deposits, however, are scarce.
[[Category:Elements]]
[[Category:Elements]]