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Nuclei

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Modern Physics

Dual Nature of Radiation and Matter
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Semiconductor Electronics : Materials, Devices and Simple Circuits
  1. The stable nucleus that has a radius half that of Fe56 is
    1. ​Li7
    2. Na21​
    3. S16
    4. Ca40
Correct Option: A

​The nuclear radius ​R = R0 A1/3
or R ∝ A1/3
or R3 ∝ A ⇒ A ∝ R3

∴
A2
=
R2
3
A1R1

=
R1/2
3=
1
R18

A2 =
A1
=
56
= 7
88


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