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Natural calcium is a mixture of five stable isotopes (40 Ca, 42 Ca, 43 Ca, 44 Ca, and 46 Ca) and one isotope with a half-life so long that it is for all practical purposes stable (48 Ca, with a half-life of about 4.3 × 10 19 years). Calcium is the first (lightest) element to have six naturally occurring isotopes. [14]
Egg Shells or Oyster Shells. Adding crushed egg shells or oyster shells to the soil is a natural way to boost your plants' calcium. Add the shells to your compost or top layer of soil. Over time ...
Calcium carbonate is also used as a firming agent in many canned and bottled vegetable products. Several calcium supplement formulations have been documented to contain the chemical element lead, [69] posing a public health concern. [70] Lead is commonly found in natural sources of calcium. [69]
Calcium chloride is commonly encountered as a hydrated solid with generic formula CaCl2·nH2O, where n = 0, 1, 2, 4, and 6. These compounds are mainly used for de-icing and dust control. Because the anhydrous salt is hygroscopic and deliquescent, it is used as a desiccant. [ 10 ]
Yogurt. It’s no secret that dairy products are a great source of calcium: Take plain, low-fat yogurt for example. The average serving size of 8 ounces (or 1 cup) has a whopping 448 mg of calcium.
Lime is an inorganic material composed primarily of calcium oxides and hydroxides. It is also the name for calcium oxide which occurs as a product of coal-seam fires and in altered limestone xenoliths in volcanic ejecta. [ 1] The International Mineralogical Association recognizes lime as a mineral with the chemical formula of CaO. [ 2]
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