| Krypton [Kr] (CAS-ID: 7439-90-9) | |
| An: 36 N: 48 Am: 83.798 | |
| Group No: 18 Group Name: Noble Gases | |
| Block: p-block Period: 4 | |
| State: Gas | |
| Colour: Colourless Classification: Non-metallic | |
| Boiling Point: 119.93K (-153.22'C) | |
| Melting Point: 115.78K (-157.36'C) | |
| Density: 3.749g/l | |
| Availability: Krypton is present in the air at about 1 ppm. | |
 Discovery Information |
| Who: Sir William Ramsey , M.W. Travers |
| When: 1898 |
| Where: Great Britain |
| Name Origin |
| Greek: kryptos (hidden). |
| Sources |
| Forms around 1 millionth of the atmosphere. Obtained from production of liquid air. |
| Uses |
| Used in fluorescent bulbs, flashbulbs, UV lasers and as a wavelength standard. |
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