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28 Jan 2023, Sat
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Bipina Poudel Science/Tech

Scientific symbol for calcium

Question

What is the scientific symbol for calcium?

Options
Option A

Cl

Option B

C

Option C

Na

Option D

Ca

Correct Option

Option D

Explanation

Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust and the third most abundant metal, after iron and aluminium. The most common calcium compound on Earth is calcium carbonate, found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium.

Atomic number 20
Groupgroup 2 (alkaline earth metals
Periodperiod 4
Blocks-block
Electron configuration[Ar] 4s2
Electron per Shell2, 8, 8, 2
Element category Alkaline earth metal
Calcium in the periodic table

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