The Elements - Periodic Table
Neodymium For high strength magnets for disk drives. Atomic Number: 60 Atomic Symbol: Nd Atomic Weight: 144.24 Electron Configur ...
Isotopes Natural neodymium is a mixture of seven stable isotopes. Fourteen other radioactive isotopes are recognized. Uses Didym ...
Promethium For nuclear batteries. Atomic Number: 61 Atomic Symbol: Pm Atomic Weight: 145 Electron Configuration:[Xe]6s^2 4f^5 Hi ...
Uses The element has applications as a beta source for thickness gages, and it can be absorbed by a phosphor to produce light. L ...
Samarium For lasers. Atomic Number: 62 Atomic Symbol: Sm Atomic Weight: 150.4 Electron Configuration:[Xe]6s^2 4f^6 History (Sama ...
Uses Samarium, along with other rare earths, is used for carbon-arc lighting for the motion picture industry. SmCo 5 has been us ...
Gadolinium For computer memory. Atomic Number: 64 Atomic Symbol: Gd Atomic Weight: 157.25 Electron Configuration:[Xe]6s^2 4f^7 5 ...
in dilute acid. Gadolinium has the highest thermal neutron capture cross-section of any known element (49,000 barns). Uses Gadol ...
Terbium For fluorescent lamps. Atomic Number: 65 Atomic Symbol: Tb Atomic Weight: 158.9254 Electron Configuration:[Xe]6s^2 4f^9 ...
Cost The element is priced at about $30/g (99.9%). Handling Little is known of the toxicity of terbium. It should be handled wit ...
Dysprosium For color TV tubes. Atomic Number: 66 Atomic Symbol: Dy Atomic Weight: 162.50 Electron Configuration:[Xe]6s^2 4f^10 H ...
Cost The cost of dysprosium metal has dropped in recent years since the development of ion-exchange and solvent extraction techn ...
Holmium For eye-safe lasers. Atomic Number: 67 Atomic Symbol: Ho Atomic Weight: 164.9304 Electron Configuration:[Xe]6s^2 4f^11 H ...
Erbium For coating for sunglasses. Atomic Number: 68 Atomic Symbol: Er Atomic Weight: 167.26 Electron Configuration:[Xe]6s^2 4f^ ...
Thulium For lasers. Atomic Number: 69 Atomic Symbol: Tm Atomic Weight: 168.9342 Electron Configuration:[Xe]6s^2 4f^13 History (T ...
Ytterbium For dentures. Atomic Number: 70 Atomic Symbol: Yb Atomic Weight: 173.04 Electron Configuration:[Xe]6s^2 4f^14 History ...
high pressures at room temperatures. The beta form ordinarily has metallic-type conductivity, but becomes a semiconductor when t ...
Lutetium For dentures. Atomic Number: 71 Atomic Symbol: Lu Atomic Weight: 174.97 Electron Configuration:[Xe]6s^2 4f^14 5d^1 Hist ...
Protactinium Atomic Number: 91 Atomic Symbol: Pa Atomic Weight: 231.0359 Electron Configuration:[Rn]7s^2 5f^2 6d^1 History (Gr. ...
Uranium For Nuclear Fission Atomic Number: 92 Atomic Symbol: U Atomic Weight: 238.029 Electron Configuration:[Rn]7s^2 5f^3 6d^1 ...
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