lighter flints

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• rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

• cerium — /sear ee euhm/, n. a steel gray, ductile metallic element of the rare earth group found only in combination. Symbol: Ce; at. wt.: 140.12; at. no.: 58. [1795 1805; CER(ES) + IUM] * * * Chemical element, a rare earth metal of the lanthanide series… …   Universalium

• pyrophoric alloy — noun an alloy that emits sparks when struck or scratched with steel; used in lighter flints • Hypernyms: ↑alloy, ↑metal • Hyponyms: ↑ferrocerium, ↑misch metal * * * noun : an alloy (as ferrocerium) that has the property of emitting sparks when… …   Useful english dictionary

• ferrocerium — noun a pyrophoric alloy of iron with cerium; used for lighter flints • Hypernyms: ↑pyrophoric alloy * * * |fe(ˌ)rō+ noun Etymology: New Latin, from ferro + cerium : a crude iron alloy containing a high percentage of cerium and used for flints in… …   Useful english dictionary

• F-block — The f block of the periodic table of the elements consists of those elements (sometimes referred to as the inner transition elements ) for which, in the atomic ground state, the highest energy electrons occupy f orbitals.Unlike the other blocks,… …   Wikipedia

• Lanthanum — (pronEng|ˈlænθənəm) is a chemical element with the symbol La and atomic number 57. Characteristics Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table and is a lanthanoid. Found in some rare earth minerals …   Wikipedia

• Light painting — Light painting, also known as light drawing is a photographic technique in which exposures are made usually at night or in a darkened room by moving a hand held light source or by moving the camera. In many cases the light source itself does not… …   Wikipedia

• lanthanum — /lan theuh neuhm/, n. Chem. a rare earth, trivalent, metallic element, allied to aluminum, found in certain minerals, as monazite. Symbol: La; at. wt.: 138.91; at. no.: 57; sp. gr.: 6.15 at 20°C. [ < NL (1841), equiv. to lanthan ( < Gk lanthánein …   Universalium

• neodymium — /nee oh dim ee euhm/, n. Chem. a rare earth, metallic, trivalent element occurring with cerium and other rare earth metals, and having rose colored to violet colored salts. Symbol: Nd; at. wt.: 144.24; at. no.: 60; sp. gr.: 6.9 at 20°C. [1880 85; …   Universalium

• misch metal — [mish] n. an alloy consisting of various rare earth elements, esp. cerium and lanthanum, used in lighter flints, vacuum tubes, etc …   English World dictionary

• atomic number 58 — noun a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare earth group • Syn: ↑cerium, ↑Ce • Derivationally related forms: ↑cerous (for: ↑cerium) • Hypernyms …   Useful english dictionary