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CALCIUM
Calcium is crucial for cell wall strength. It's also involved in plant enzyme activity.
Name: calcium Symbol: Ca Atomic number: 20 Atomic weight: 40.078 (4) g Group in periodic table: 2 Group name: Alkaline earth metal Period in periodic table: 4 Block in periodic table: s-block CAS registry ID: 7440-70-2Calcium is a metallic element, fifth in abundance in the earth's crust, of which it forms more than 3%. It is an essential constituent of leaves, bones, teeth, and shells. The metal is a silvery colour and is rather hard. Chemically it is one of the alkaline earth elements; it readily forms a white coating of nitride in air, reacts with water, burns with a yellow-red flame, forming largely the nitride. Calcium does not occur free in nature. Calcium is found mostly as limestone, gypsum and fluorite. Stalagmites and stalactites contain calcium carbonate.
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Science Dictionary INDEX:List of Terms: Terms beginning with "A", Page 1 |
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A: Page 1 of 22. |
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