The mean distance between the atoms of iron is $3 \times {10^{ - 10}}m$ and interatomic force constant for iron is $7\,N\,/m$The Young’s modulus of elasticity for iron is
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(d)$Y = \frac{k}{{{r_0}}} = \frac{7}{{3 \times {{10}^{ - 10}}}} = 2.33 \times {10^{10}}N/{m^2}$
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