Symbol: Ca Atomic Number: 20 Atomic Weight: 40.078 Appearance: Silvery white, somewhat soft metal Melting Point: 839±2°C Boiling Point: 1484°C Density: 1.54 g/cm³ Occurrence: Abundant in the Earth's crust, fifth most abundant element Uses: Essential for biological processes, used in industry, and as a food additive.
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