Krypton | Name | Krypton | | Symbol | Kr | | Atomic Number | 36 | | Atomic Mass | 83.8 atomic mass units | | Number of Protons | 36 | | Number of Neutrons | 48 | | Number of Electrons | 36 | | Melting Point | -157.2° C | | Boiling Point | -153.4° C | | Density | 3.74 grams per cubic centimeter | | Normal Phase | Gas | | Family | Noble Gas | | Period | 4 | | Cost | $33.00 for 100 grams | | Origin of Name | From the Greek word kryptos, meaning hidden | | Date and Place of Discovery | In May 1898 in England | | Discovered by | Sir William Ramsey and Morris W. Travers | | Common Compounds | - Krypton difluoride (KrF2)
| | Interesting facts | - It is found free in nature.
- It is produced when air is purified, compressed, cooled, distilled and condensed.
- It is usually mixed with a halogen (usually fluorine) when used in lasers.
| | Common Uses | - Lighting
- Lasers
- Laboratory research
- Medical imaging
| | Photo Courtesy of About.com Chemical Elements. com Chemicool. com Jefferson Lab Wikipedia | | Krypton Atomic Structure | Elements by Name | Elements by Number | Home | |
