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| Basic Information: Symbol: Kr Atomic Number: 36 Atomic Mass: 83.8 amu Melting Point: -157.2 *C Boiling Point: -153.4 *C Numberof Protons/Electrons: 36 Number of Neutrons: 48 Classification: Noble Gas Crystal Structure: Cubic Density @ 293 K: 3.74 g/cm^3 Color: colorless gas |
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| KR-78 |
| KR-79 |
| KR-80 |
| KR-81 |
| KR-82 |
| KR-83 |
| KR-83m |
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| KR-84 |
| KR-85 |
| KR-85m |
| KR-86 |
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| Stable |
| Stable |
| Stable |
| Stable |
| Stable |
| Stable |
| 1.45 days |
| 210000 years |
| 1.86 hours |
| 10.73 years |
| 4.48 hours |
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| KR-87 |
| KR-88 |
| KR-89 |
| KR-90 |
| Facts: Date of Discovery: 1898 Discoverer: Sir William Ramsay Name Origin: From the Greek work Kryptos Uses: Lightning Obtained From: prodution of liquid air |
| Isotope |
| Half Life |
| The Krypton atom has 4 energy levels. The first one has 2 electrons, the second 8, the third 18, and the fourth 8. |
| A colorless, odorless gas that is inert to everything but flourine gas. The isotope Krypton 86 has a line in its atomic spectrum that is now the standard measure of length: 1 meter is defined as exaclty 1,650,763.73 wavelengths of this line. Krypton is one of the rarest gases in the earth's atmosphere, accounting for only 1 part per million by volume. |
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| 1.27 hours |
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| 2.84 hours |
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| 3.15 minutes |
| 32.3 seconds |
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