classify the following into elements and compounds iron, iron sulphide, oxygen ,carbon ,urea, sodium ,chalk, washing soda and gold
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Explanation:
Iron(Fe) , Gold(Au) , Carbon(C) , Sodium(Na) are elements.
Oxygen(O2) is a molecule.
Washing Soda(Na2CO3.10H2O) , Chalk(CaCO3) , Iron sulphide(FeS) and urea are compounds.
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same
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