Difference between revisions of "Krypton"
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(New page: {{Element | name=Krypton| symbol=Kr | anumber=36 | amass=83.8 amu | noe=36 | class=Noble Gas | cstructure=Cubic | color=Colorless | date=1898 | discname= Sir William Ramsay | origname=...) |
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| − | {{Element | name=Krypton| symbol=Kr | anumber=36 | amass=83.8 amu | noe=36 | class=Noble Gas | cstructure= | + | {{Element | name=Krypton| symbol=Kr | anumber=36 | amass=83.8 amu | noe=36 | class=Noble Gas | cstructure=Face-centered cubic | color=Colorless | date=1898 | discname= Sir [[William Ramsay]] and M. W. Travers | origname=From the Greek word ''kryptos'' (hidden) | uses=Lighting and scientific standards | obtained=Production of liquid air}} |
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| + | '''Krypton''' is an [[element]] in the "[[noble gas]]" class (or "inert gas") of the [[periodic table of the elements|periodic table]]. It is colorless and odorless. It is almost (but not completely) chemically inert. It has six stable isotopes. | ||
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| + | It is noteworthy in that one of its spectral lines is used as the official scientific definition of length—1 meter is 1650763.73 wavelengths. (Prior to that, the meter was defined as the distance between two lines scratched on the "International Standard Meter stick".) | ||
Revision as of 20:17, November 15, 2008
| Krypton | |
|---|---|
| Properties | |
| Atomic symbol | Kr |
| Atomic number | 36 |
| Classification | Noble Gas |
| Atomic mass | 83.8 amu |
| Other Information | |
| Date of discovery | 1898 |
| Name of discoverer | Sir William Ramsay and M. W. Travers |
| Name origin | From the Greek word kryptos (hidden) |
| Uses | Lighting and scientific standards |
| Obtained from | Production of liquid air |
Krypton is an element in the "noble gas" class (or "inert gas") of the periodic table. It is colorless and odorless. It is almost (but not completely) chemically inert. It has six stable isotopes.
It is noteworthy in that one of its spectral lines is used as the official scientific definition of length—1 meter is 1650763.73 wavelengths. (Prior to that, the meter was defined as the distance between two lines scratched on the "International Standard Meter stick".)