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Q.

In which of the following the magic numbers of both protons and neutrons are present?

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a

50Sn123

b

82Pb208

c

82Pb206

d

50Sn118

answer is B.

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Detailed Solution

The  magic numbers are 2, 8, 20, 28, 50, 82, 126, in the case of protons by comparing the number of stable isotopes for different proton numbers. For neutrons the magic numbers were found by comparing the number of stable nuclides with the same number of neutron.
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