Based on the mass of protons and neutrons (in a.m.u.), which Delta m is greater,
ID: 475257 • Letter: B
Question
Based on the mass of protons and neutrons (in a.m.u.), which Delta m is greater, that for^238U or^235U? Compute each, show how you computed them, and explain why. Why don't liquids and gases behave the same way when they are compressed? The newly discovered clement Oganesson was for some time simply called Element-118. Concerning its nucleus, what is the most compact way 118 protons can arrange around a central point, assuming they do not touch each other, and have neutrons between them as "spacers"? Draw any diagram you need to prove your point, and assume as many neutrons as needed, but show or explain how all 118 protons can be arranged.Explanation / Answer
Q3.
AMU = atomic mass units
For
dM = Change in mass
The atomic mass of 238/92 U is 238.050785 amu.
The atomic mass of 235/92 U is 235.043924 amu.
a) For U 238 isotope:
92 protons and 238-92 = 146 neutrons are present
Mass of proton = 1.007825
Mass of neutrón = 1.008665
Total mass = 92*1.007825 + 146*1.008665 = 239.98499 amu
The mass defect: 238.050785-239.98499 = -1.934205 amu
b) For U 235 isotope:
92 protons and 235-92 = 143 neutrons are present
Mass of proton = 1.007825
Mass of neutrón = 1.008665
Total mass = 92*1.007825 + 143*1.008665 = 236.958995 amu
The mass defect: 235.043924-236.958995 = -1.915071 amu
Then
Mass deffect for 238-U = -1.934205
Mass deffect for 235-U = 1.915071
therefore, the 238 U isotope has a higher mass deffect, which should make sense since it has higher amount of neutrons, therefore, each will have a a mass deffect, in total, ill be higher mass deffect for the overall isotope
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