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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements.Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.

  3. Calcium - Wikipedia

    en.wikipedia.org/wiki/Calcium

    Besides the simple oxide CaO, calcium peroxide, CaO 2, can be made by direct oxidation of calcium metal under a high pressure of oxygen, and there is some evidence for a yellow superoxide Ca(O 2) 2. [16] Calcium hydroxide, Ca(OH) 2, is a strong base, though not as strong as the hydroxides of strontium, barium or the alkali metals. [17]

  4. 5 Helpful Calcium Supplements for Bone Health You Can Order ...

    www.aol.com/lifestyle/best-calcium-supplements...

    Here, registered dietitians recommend the best calcium supplements for bone health and offer expert advice on who needs a calcium supplement and why. 5 Helpful Calcium Supplements for Bone Health ...

  5. Calcium carbide - Wikipedia

    en.wikipedia.org/wiki/Calcium_carbide

    Calcium carbide is a calcium salt of acetylene, consisting of calcium cations Ca 2+ and acetylide anions − C≡C −. Pure calcium carbide is a colourless solid. The common crystalline form at room temperature is a distorted rock-salt structure with the C 2− 2 units lying parallel. [13]

  6. Coinage metals - Wikipedia

    en.wikipedia.org/wiki/Coinage_metals

    Cupronickel, a base metal alloy with varying proportions of copper and nickel, was introduced as a cheaper alternative for silver in coinage. Cupronickel, most commonly 75% copper, 25% nickel, has a silver color, is hard wearing and has excellent striking properties, essential for the design of the coin to be pressed accurately and quickly ...

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  8. Al-Ca composite - Wikipedia

    en.wikipedia.org/wiki/Al-Ca_composite

    Al-Ca composite is a high-conductivity, high-strength, lightweight composite consisting of sub-micron-diameter pure calcium metal filaments embedded inside a pure aluminium metal matrix. The material is still in the development phase, but it has potential use as an overhead high-voltage power transmission conductor. [1]

  9. Reactivity series - Wikipedia

    en.wikipedia.org/wiki/Reactivity_series

    Metal Ion Reactivity Extraction Caesium Cs Cs + reacts with cold water Electrolysis (a.k.a. electrolytic refining) Rubidium Rb Rb + Potassium K K + Sodium Na Na + Lithium Li Li + Barium Ba Ba 2+ Strontium Sr Sr 2+ Calcium Ca Ca 2+ Magnesium Mg Mg 2+ reacts very slowly with cold water, but rapidly in boiling water, and very vigorously with acids ...