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WB JEE Medical WB JEE Medical Solved Paper-2007

  • question_answer
    Li nucleus has three protons and four neutrons. Mass of lithium nucleus is 7.016005 amu. Mass of proton is 1.007277 amu and mass of neutronis 1.008665 amu. Mass defect for lithium nucleus in amu is

    A)  0.04048 amu     

    B)  0.04050 amu

    C)  0.04052 amu     

    D)  0.04055 amu

    Correct Answer: B

    Solution :

                     Mass defect == mass of nucleons - mass of nucleus \[=(3\times 1.007277+4\times 1.008665)-7.016005\] \[=0.040486\,\text{amu}\] \[\approx 0.04050\,\text{amu}\]


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