The radius of a spherical nucleus as measured by electron scattering is 3.6 fm. What is the mass number of the nucleus most likely to be ?
The radius of a spherical nucleus as measured by electron scattering is 3.6 fm. What is the mass number of the nucleus most likely to be ?
A. 27
B. 40
C. 56
D. 120
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Correct Answer - a
Nuclear radius , `R=R_0(A)^(1//3)`
where A is the mass number of a nucleus .
Given, R=3.6 fm
`therefore` 3.6 fm=(1.2 fm) `(A^(1//3)) " " [because R_0=1.2 fm]`
or A=`(3)^3`=27
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