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| Half Life |
| Isotope |
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| 14.6 hours |
| Rn-211 |
| Rn-212 |
| Rn-217 |
| Rn-218 |
| Rn-219 |
| Rn-220 |
| Rn-222 |
| 24 minutes |
| 0.6 milliseconds |
| 35 milliseconds |
| 3.96 seconds |
| 55.61 seconds |
| 3.82 days |
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| Basic Information: Symbol: Rn Atomic Number: 86 Atomic Mass: (222.0) amu Melting Point: -71.0*C Boiling Point: -61.8*C Number of Protons/Electrons: 86 Number of Neutrons: 136 Classiication: Noble Gas Density @ 293 K: 9.73 g/cm^3 Color: colorless |
| Facts: Date of Discovery: 1898 Discoverer: Fredrich Ernst Dorn Uses: treatment of cancer Obtained From: decay of radium |
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| The Radon atom has 6 levels of electrons. The first has 2 electrons, the second 8, the third, 18, the fourth 32, the fifth 18, and the sixth, 8. |
| Radon was the first as discovered as the gas produced from radium as it decayed in sealed ampoules. It is a very dangerous gas because it gives off alpha rays. There is a detectable amount in the atmosphere, and concentrations can build up indoors in certain localities. There are twenty isotopes found. |