Difference between revisions of "Chromium"
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'''Chromium''' (Cr) is a [[chemical]] [[element]] found at number 24 on the [[periodic table]]. It is a hard, lustrous gray transition metal used in plating processes and the production of stainless steel. | '''Chromium''' (Cr) is a [[chemical]] [[element]] found at number 24 on the [[periodic table]]. It is a hard, lustrous gray transition metal used in plating processes and the production of stainless steel. | ||
| − | Chromium is generally found in nature in the mineral ''chromite'' (FeO - Cr<sub>2</sub>O<sub>3</sub>), but can also be found in [[crocoite]] (PbCrO<sub>4</sub>). It is also | + | Chromium is generally found in nature in the mineral ''chromite'' (FeO - Cr<sub>2</sub>O<sub>3</sub>), but can also be found in [[crocoite]] (PbCrO<sub>4</sub>). It is also an essential mineral for life; a deficiency will lead to a reduction in glucose tolerance, as several chromium (III) compounds have been found to enhance the effectiveness of insulin. However, some chromates are hazardous to one's health when injested/inhaled. |
| + | |||
| + | ==References== | ||
| + | *[http://www.answers.com/topic/chromium Answers.com] | ||
| + | *[http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=13096 OSHA.gov regulation on hexavalent chromium] | ||
Revision as of 00:16, March 3, 2009
| Chromium | |
|---|---|
| Properties | |
| Atomic symbol | Cr |
| Atomic number | 24 |
| Classification | Transition metal |
| Atomic mass | 52.0 amu |
| Other Information | |
| Date of discovery | 1797 |
| Name of discoverer | Louis Vauquelin |
| Name origin | From the Greek word chrôma (color) |
| Uses | Stainless steel |
| Obtained from | Chromite |
Chromium (Cr) is a chemical element found at number 24 on the periodic table. It is a hard, lustrous gray transition metal used in plating processes and the production of stainless steel.
Chromium is generally found in nature in the mineral chromite (FeO - Cr2O3), but can also be found in crocoite (PbCrO4). It is also an essential mineral for life; a deficiency will lead to a reduction in glucose tolerance, as several chromium (III) compounds have been found to enhance the effectiveness of insulin. However, some chromates are hazardous to one's health when injested/inhaled.