what are the characteristics of the rare earth metals?
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['The rare earths are silver, silvery-white, or gray metals.', 'The metals have a high luster but tarnish readily in air.', 'The metals have high electrical conductivity.', 'The rare earths share many common properties.']
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['Color : Silvery-white metal.', 'Phase : Solid.', 'Crystalline structure : Hexagonal.', 'Ductility : It can be beaten into extremely thin sheets.', 'Malleability : Capable of being shaped or bent.', 'Luster : Exhibits a shine or glow.', 'Hardness : Relatively soft.']
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Neodymium magnets have higher remanence, much higher coercivity and energy product, but often lower Curie temperature than other types of magnets. Special neodymium magnet alloys that include terbium and dysprosium have been developed that have higher Curie temperature, allowing them to tolerate higher temperatures.
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['Lustrous (shiny)', 'Good conductors of heat and electricity.', 'High melting point.', 'High density (heavy for their size)', 'Malleable (can be hammered)', 'Ductile (can be drawn into wires)', 'Usually solid at room temperature (an exception is mercury)', "Opaque as a thin sheet (can't see through metals)"]
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The lanthanides are a group of 15 chemical elements, with atomic numbers 57 through 71. All of these elements have one valence electron in the 5d shell. The elements share properties in common with the first element in the group -- lanthanum. The lanthanides are reactive, silver-colored metals.
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The rare earths metals are silver, silvery-white or gray metals which have a high luster, but tarnish readily in air. The rare earth metals have high electrical conductivity.
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['density.', 'melting point.', 'thermal conductivity.', 'electrical conductivity (resistivity)', 'thermal expansion.', 'corrosion resistance.']
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Thulium is a lanthanide element, it has a bright silvery-gray luster and can be cut by a knife. It is the least abundant of the rare earths and its metal is easy to work. It slowly tarnishes in air, but is more resistant to oxidation than most rare-earth elements.
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['Color : Silver-gray metal.', 'Malleability : Capable of being shaped or bent.', 'Ductility : Easily pulled or stretched into a thin wire.', 'Luster : Has a shine or glow.', 'Conductivity : Good transmission of heat or electricity.']
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Answer and Explanation: Three characteristics of metals are their good conductivity, malleability, and shiny appearance. Metals are good conductors of heat and electricity,...
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The alkali metals have the high thermal and electrical conductivity, lustre, ductility, and malleability that are characteristic of metals. Each alkali metal atom has a single electron in its outermost shell.
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Some of the important characteristics of materials are : strength, durability, flexibility, weight, resistance to heat and corrosion, ability to cast, welded or hardened, machinability, electrical conductivity, etc.
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['Attractive Property – Magnet attracts ferromagnetic materials like iron, cobalt, and nickel.', 'Repulsive Properties – Like magnetic poles repel each other and unlike magnetic poles attract each other.', 'Directive Property – A freely suspended magnet always points in a north-south direction.']
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Similarities :- Both Lanthanides and Actinides are paramagnetic. Both have high melting and boiling point. Both have common oxidation state .
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Actinides are typical metals and have properties of both the d-block and the f-block elements, but they are also radioactive. Lanthanides have different chemistry from transition metals because their 4f orbitals are shielded from the atom's environment.
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['Electrical and thermal conductivity.', 'Malleability and ductility.', 'Melting point.', 'Solubility.']
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['The density of metals is usually high.', 'Metals are malleable and ductile.', 'Metals form an alloy with other metals or non – metals.', 'Some metals react with air and corrode. ... ', 'Metals are good conductors of heat and electricity. ... ', 'Generally, metals are in a solid state at room temperature.']