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2. Why is the symbol S for sulphur, but Na for sodium and Si for silicon ?

Answer»

Sodiumis a chemical element withsymbol Na(from Latin natrium) and atomic number 11. ...Sodiumwas first isolated by Humphry Davy in 1807 by the electrolysis ofsodiumhydroxide.

2)The ElementSulfur--SulfurAtom. SI units & STP are used except where noted.Sulfur(sulphur) is a chemical element in the periodic table that has thesymbol Sand atomic number 16. ... It is an essential element in all living organisms and is needed in several amino acids and hence in many proteins.

Siliconis a chemical element (itssymbolin chemical formula expressions is "Si") that is present in sand and glass and which is the best known semiconductor material in electronic components. Its atomic number is 14. The most common isotope has atomic weight 28.



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