The Elements - Periodic Table
Handling Concentrations in air as low as 10 7 g/m 3 can cause lung congestion, skin damage, or eye damage. Exposure to osmium te ...
Gold For gold bars. Atomic Number: 79 Atomic Symbol: Au Atomic Weight: 196.9665 Electron Configuration:[Xe]6s^1 4f^14 5d^10 Hist ...
Cost Gold, like other precious metals, is measured in troy weight; when alloyed with other metals, the term carat is used to exp ...
Thallium For insecticides. Atomic Number: 81 Atomic Symbol: Tl Atomic Weight: 204.37 Electron Configuration:[Xe]6s^2 4f^14 5d^10 ...
Handling The element and its compounds are toxic and should be handled carefully. Contact of the metal with skin is dangerous, a ...
Bismuth For fuses. Atomic Number: 83 Atomic Symbol: Bi Atomic Weight: 208.9804 Electron Configuration:[Xe]6s^2 4f^14 5d^10 6p^3 ...
detection work. Bismuth oxychloride is used extensively in cosmetics. Bismuth subnitrate and subcarbonate are used in medicine. ...
Polonium For nuclear batteries. Atomic Number: 84 Atomic Symbol: Po Atomic Weight: 209 Electron Configuration:[Xe]6s^2 4f^14 5d^ ...
Uses Because almost all alpha radiation is stopped within the solid source and its container, giving up its energy, polonium has ...
Astatine Seldom found in nature. Atomic Number: 85 Atomic Symbol: At Atomic Weight: 210 Electron Configuration:[Xe]6s^2 4f^14 5d ...
Sources: CRC Handbook of Chemistry and Physics and the American Chemical Society. Last Updated: 12/19/97, CST Information Servic ...
Radon For earthquake prediction. Atomic Number: 86 Atomic Symbol: Rn Atomic Weight: 222 Electron Configuration:[Xe]6s^2 4f^14 5d ...
Cost Radon is available at a cost of about $4/m. Handling Care must be taken in handling radon, as with other radioactive materi ...
Francium Seldom found in nature. Atomic Number: 87 Atomic Symbol: Fr Atomic Weight: 223 Electron Configuration:[Rn]7s^1 History ...
Radium For glow in the dark paint. Atomic Number: 88 Atomic Symbol: Ra Atomic Weight: 226.0254 Electron Configuration: [Rn]7s^2 ...
Uses One gram of radium produces about 0.0001 ml (stp) of emanation, or radon gas, per day. This is purged from the radium and s ...
Actinium Neutron source. Atomic Number: 89 Atomic Symbol: Ac Atomic Weight: 227 Electron Configuration:[Rn]7s^2 6d^1 History (Gr ...
Rutherfordium Proposed name Atomic Number: 104 Atomic Symbol: Rf / Ku Atomic Weight: 261 Electron Configuration:[Rn]7s^2 5f^14 6 ...
The same reaction, except with the emission of three neutrons, was thought to have produced 258-104 with a half-life of about 1/ ...
Dubnium Proposed Name Atomic Number: 105 Atomic Symbol: Db Atomic Weight: 262 Electron Configuration:[Rn]7s^2 5f^14 6d^3 History ...
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