Question

Nuclear Physics - Alpha Decay a - decay After Before a Parent Daughter 4P→ D + He Z A plutonium Pu nucleus (94 protons, 239 nucleons) go through an a - decay. (a) Find the number of protons and the number of nucleons in the Daughter nucleus. Enter the number of protons in the first box, and number of nucleons in the 2nd box. Enter a number Submit (5 attempts remaining) Enter a number Submit (5 attempts remaining) The relevant rest masses are: Parent Pu = 239.052157 u, daughter = 235.043924 u, a particle = 4.002602 u. (b) What is the mass defect in atomic mass unit u? Keep 6 decimal places. Report the mass defect as positi Enter a number u Submit (5 attempts remaining) What is the energy (in MeV) corresponding to the mass defect? Keep 3 decimal places. (1uc? = 931.5 MeV) Enter a number MeV Submit (5 attempts remaining) Is energy released in this decay or must energy be supplied for the decay to occur? Select your answer from one of the following options. a. Energy is supplied, since the total rest energy before the decay is smaller than the total rest energy after the b. Energy is released, since the total rest energy before the decay is smaller than the total rest energy after the C. Energy is supplied, since the total rest energy before the decay is larger than the total rest energy after the d. Energy is released, since the total rest energy before the decay is larger than the total rest energy after the Correct (100.0%) Submit

Answer 1

elution- de decay AP A-9 + The N. 2-2 2 for conserving Betc. Gre & forstens Product (son of freatons les acesta Daughter AYD nucleus Z-2 239 pu + He 94 92 no. of foretons which reforesents crazedona no. of nuclens 235 defect com mpu (mot mne meu 239. os2157 ce 235. 04392 u u 4.002602 cu Am S. 631 x 10-3 mne u

Note: masses & can't be we en gor Suestion there then stiel - defect find out flows- mru z mert NMN 2 no. of fratens neist sans no. of A g4x 1.00728ut (239-94) x 11.00867) u - 24ogy in 7 will actual Values varies, but may affensinately same. 8 ДЕ 2 Amc² 5.63 x 10-3 s. 631x10-3x S.245 ec? 931.S mer LAE mer gréseal mass > Final mass- sma tve tve AG that remaining mass goes out in the form of energy lie; energy released. option