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anonymous
 one year ago
the mass of 4Be7 is 1.1652*10, what is the defect of the beryllium nucleus?
anonymous
 one year ago
the mass of 4Be7 is 1.1652*10, what is the defect of the beryllium nucleus?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0proton mass = 1.6*10^27 neutron mass = 1.67*10^27

fretje
 one year ago
Best ResponseYou've already chosen the best response.0Beryllium is dangerous. and your data is wrong. 4Be7 is not stable. calculating mass defect for 4Be9: electron mass 9.10938291 × 1031 kg proton mass 1.67262178 × 1027 kg neutron mass 1.674894121 × 1027 kg Be mass 14.96510886 × 1027 kg mass defect = \[\Delta m\] = 4*1.67262178 × 10^27 + 5*1.674894121 × 10^27+4*9.10938291 × 10^31  14.96510886 × 10^27 = 0.10349261816 × 10^27

fretje
 one year ago
Best ResponseYou've already chosen the best response.0\[\Delta m = 0.10349261816 × 10^{27} kg\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what formula did u use ?

cwrw238
 one year ago
Best ResponseYou've already chosen the best response.0sorry cany help with this one

fretje
 one year ago
Best ResponseYou've already chosen the best response.0so what i did, i added from given data from internet, the mass of all the protons(4 times), all the neutrons(5 times), and all the electrons in the element (4times), and subtract the given mass of the element from the table of Mendeliev. The result is the mass defect. electron mass 9.10938291 × 1031 kg proton mass 1.67262178 × 1027 kg neutron mass 1.674894121 × 1027 kg Beryllium (Be) mass 14.96510886 × 1027 kg Mass defect = 4*1.67262178 × 10^27 + 5*1.674894121 × 10^27+4*9.10938291 × 10^31  14.96510886 × 10^27 = 0.10349261816 × 10^27 To understand mass defect one can read http://physics.bu.edu/~duffy/sc546_notes10/mass_defect.html
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