The number of atoms present in one mole of an element is equal to avogadro number which of the following elements contains the greatest number of atoms 4gm He and 46gm Na and 0.40gm Ca or 12 gm He
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12 g of He as no. Of moles is highest in this.
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He is the answer it contains 3 moles i.e=3×avagadros no.
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