Granules of the metal calcium (Ca) as used in a UK high school.

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Calcium is the chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the Earth's crust. Calcium is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

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Size: 3624px × 2415px
Location: London UK
Photo credit: © Maurice Savage / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: alkaline, ca, calcium, close, detail, earth, education, glass, granules, gray, high, material, metal, practicals, school, science, soft, uk, watch