1.

Find the nuclear radii of 206Pb and 208Pb.

Answer»

Data : R0 = 1.2 × 10-15 m

Nuclear radius, R=R0A1/3

(i) For 206Pb, A = 206

∴ R = (1.2 × 10-15) (206)1/3

= 1.2 × 10-15 × 5.906 

= 7.087 × 10-15 m = 7.087 fm

(ii) For 208Pb, A = 208

∴ R = (1.2 × 10-15)(208)1/3

= 1.2 × 10-15 × 5.925 

= 7.11 × 10-15 m = 7.11 fm


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