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निम्न नाभिकों की त्रिज्या ज्ञात कीजिए-
(i) `._(6)C^(12)` (ii) `._(13)Al^(27)` (iii) `._(32)Ge^(70)`

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(i) नाभिक की त्रिज्या
`R=R_(0)A^(1//3)=1.2(A)^(1//3)` फर्मी
`._(6)C^(12)` नाभिक के लिए `A=12`
`:. R=(1.2)(12)^(1//3)`
`~~1.2xx2.5~~2.7` फर्मी
(ii) `._(13)Al^(27)` नाभिक के लिए `A=27`
`:.R=(1.2)(27)^(1//3)`
`=1.2xx3=3.6` फर्मी
(iii) `._(32)Ge^(70)` नाभिक के लिए `A=70`
`R=1.2(70)^(1//3)=1.2xx4.12`
`~~5.04` फर्मी

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