Coltan
Coltan is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite, and the tantalum-dominant mineral is the tantalite.
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Beryllium is a toxic bivalent element, steel gray, strong, light-weight, primarily used as hardening agent in alloys. Beryllium has one of the highest melting points of the light metals. It has excellent thermal conductivity, is nonmagnetic, it resists attack by concentrated nitric acid and at standard temperature and pressures beryllium resist oxidation when exposts to …
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Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum from the Greek words, hydor and argyros. Symbol: Hg Atomic mass: 200,59 u Electron configuration: [Xe] 4f¹⁴5d¹⁰6s² Atomic number: 80 Boiling point: 356,7 °C Melting point: -38,83 °C Period: period 6
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Lithium is the first of the alkalis in the periodic table. In nature it’s found like a mixture of the isotopes Li6 and Li7. It’s the lightest solid metal, it’s soft, silvery-white, with a low melting point and reactive. Many of its physical and chemical properties are more similar to those of the alkaline earth …
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Cerium (Ce), chemical element, the most abundant of the rare-earth metals. Commercial-grade cerium is iron-gray in colour, silvery when in a pure form, and about as soft and ductile as tin. It oxidizes in air at room temperature to form CeO2. The metal slowly reacts with water, and it quickly dissolves in diluted acids, except …
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Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.