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Estimate the averaage atomic mass densit...

Estimate the averaage atomic mass density of a sodium atom, assuming its size ot be 2.5 Å. Compare it with density of sodium in its crystalline phase `(970 kg m^(-3))`. Are the two denities of the same order of magnitude ? If so, why ?

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`1.3xx10^(3)kg//m^(3)`
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