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Reaction with oxygen. Ca + 1/2O 2 → CaO Mg + 1/2O 2 → MgO. Reaction with sulfur. Ca + 1/8S 8 → CaS. Reaction with carbon. With carbon, they form acetylides directly. Beryllium forms carbide. 2Be + C → Be 2 C CaO + 3C → CaC 2 + CO (at 2500 °C in furnace) CaC 2 + 2H 2 O → Ca(OH) 2 + C 2 H 2 Mg 2 C 3 + 4H 2 O → 2Mg(OH) 2 + C 3 H 4 ...
A large fraction of the chemical elements that occur naturally on the Earth's surface are essential to the structure and metabolism of living things. Four of these elements (hydrogen, carbon, nitrogen, and oxygen) are essential to every living thing and collectively make up 99% of the mass of protoplasm. [1]
Toothpaste comes in a variety of colors and flavors, intended to encourage use of the product. The three most common flavorants are peppermint, spearmint, and wintergreen. Toothpaste flavored with peppermint-anise oil is popular in the Mediterranean region. These flavors are provided by the respective oils, e.g. peppermint oil. [18]
Doramad Radioactive Toothpaste (Doramad Radioaktive Zahncreme) was a brand of toothpaste produced in Germany by Auergesellschaft of Berlin from the 1920s through World War II. [1] It was known for containing thorium , a radioactive metal, and is an example of radioactive quackery .
Burst is an American brand of toothpaste and other oral hygiene products made by the e-commerce company Burst Oral Care. It makes electric toothbrushes, dental floss, and tooth whitening strips. [2] The company was co-founded in 2017 by Hamish Khayat and Brittany Stewart in California.
Clove (Syzygium aromaticum) essential oil in clear glass vial Oil of clove , also known as clove oil or eugenol , is an essential oil extracted from the clove plant, Syzygium aromaticum . [ 1 ] [ 2 ] Clove oil is commonly used in aromatherapy and for flavoring food, tea, and toothpaste .
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