why sodium ia sofftrr than copper but both arr good electrical conductors
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In case of copper the number of delocalized electron is larger than the sodium and also the metallic radius of sodium is more than that of copper so sodium is softer than the copper. But both are good conductor of Electricity due to availability of free electrons.
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Strength of metallic bond depends upon the number of delocalized electron and the metallic radius. Greater number of delocalized electron and smaller the metallic radius stronger the metallic bond.
In case of copper the number of delocalized electron is larger than the sodium and also the metallic radius of sodium is more than that of copper so sodium is softer than the copper. But both are good conductor of Electricity due to availability of free electrons
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