Question

why sodium is considered as special case
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Answer 1

Answer:

because it is highly reactive

Explanation:

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Answer 2

Answer:

Sodium is a chemical element with the symbol Na (from Latin "natrium") and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na. The free metal does not occur in nature, and must be prepared from compounds.