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  2. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    When ice-nine comes in contact with liquid water below 45.8°C, it acts as a seed crystal, and causes the solidification of the entire body of water, which quickly crystallizes as more ice-nine. Imperial Gold Rick Riordan (Introduced in The Lost Hero.) Enchanted gold. Extremely harmful to magical creatures, but cannot harm non-magic ones. Inerton

  3. List of countries by tariff rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Global map of countries by tariff rate, applied, weighted mean, all products (%), 2021, according to World Bank.. This is a list of countries by tariff rate.The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.

  4. Ammonium acetate - Wikipedia

    en.wikipedia.org/wiki/Ammonium_acetate

    As the salt of a weak acid and a weak base, ammonium acetate is often used with acetic acid to create a buffer solution.Ammonium acetate is volatile at low pressures. Because of this, it has been used to replace cell buffers that contain non-volatile salts in preparing samples for mass spectrometry. [8]

  5. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).

  6. Fracking - Wikipedia

    en.wikipedia.org/wiki/Fracking

    Hydraulic fracturing [a] is a well stimulation technique involving the fracturing of formations in bedrock by a pressurized liquid. The process involves the high-pressure injection of "fracking fluid" (primarily water, containing sand or other proppants suspended with the aid of thickening agents) into a wellbore to create cracks in the deep rock formations through which natural gas, petroleum ...

  7. Cobalt - Wikipedia

    en.wikipedia.org/wiki/Cobalt

    Cobalt is also used in the petroleum industry as a catalyst when refining crude oil. This is to purge it of sulfur, which is very polluting when burned and causes acid rain. [11] Cobalt is the active center of a group of coenzymes called cobalamins. Vitamin B 12, the best-known example of the type, is an essential vitamin for all animals.

  8. Richter scale - Wikipedia

    en.wikipedia.org/wiki/Richter_scale

    The Richter scale [1] (/ ˈ r ɪ k t ər /), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, [2] is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude scale". [3]

  9. History of chemistry - Wikipedia

    en.wikipedia.org/wiki/History_of_chemistry

    Substances like air, water, and soil/earth, energy forms, such as fire and light, and more abstract concepts such as thoughts, aether, and heaven, were common in ancient civilizations even in the absence of any cross-fertilization: for example ancient Greek, Indian, Mayan, and Chinese philosophies all considered air, water, earth and fire as ...