Question

Why is the symbol of sodium written as Na and not S?

Answer 1

because symbols for some elements derive from their latin names
 sodium's name is derived from the latin name natrium, so its symbol is na
s is used for sulphur

Answer 2

Answer:

because some symbols of some elements are derived from Latin.For examples,sodium is called as natrium in Latin.So it's symbol changes to Na.Symbol S denotes sulphur.

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