Difference between revisions of "Manganese"
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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 separated 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. | ||
| + | {{Periodic table}} | ||
[[Category:Elements]] | [[Category:Elements]] | ||
| + | [[Category:Metals]] | ||
Latest revision as of 15:41, July 13, 2016
| Manganese | |
|---|---|
| Properties | |
| Atomic symbol | Mn |
| Atomic number | 25 |
| Classification | Transition metal |
| Atomic mass | 54.938 amu |
| Number of Stable Isotopes | 1 |
| Density (grams per cc) | 7.440 g/cm^3 |
| Other Information | |
| Date of discovery | 1774 |
| Name of discoverer | Johann Gahn |
| Name origin | From the Latin word mangnes (magnet) |
| Uses | Steel, batteries, ceramics, coins, fertilizer and animal feed additives |
| Obtained from | Pyrolusite, psilomelane, cryptomelane, manganite, rhodochrosite |
Manganese is an element in the "transition metals" class of the 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 in a blast furnace.
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 separated 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.
| Periodic Table of the Elements | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
25
Mn 54.938 |
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| *Lanthanides | ||||||||||||||||||||||||
| **Actinides | ||||||||||||||||||||||||
