Modern Physics 1 Question 20

17. If the atom 100Fm257 follows the Bohr’s model and the radius of last orbit of 100Fm257 is n times the Bohr radius, then find n

(2003,2M)

(a) 100

(b) 200

(c) 4

(d) 1/4

Show Answer

Solution:

  1. (rm)=m2z(0.53\AA)=(n×0.53)\AA

∴m2z=n

m=5 for 100Fm257 (the outermost shell) and z=100

∴n=(5)2100=14

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