The proton mass is 1.007276 amu , the neutron mass is 1.008665 amu , and the ele

ID: 926486 • Letter: T

Question

The proton mass is 1.007276 amu , the neutron mass is 1.008665 amu , and the electron mass is 5.486×104 amu .

Part A.

What is the expected mass of a sodium-23 nucleus, based on the total mass of its protons and neutrons?

Express your answer in atomic mass units using seven significant figures.

Part B

The actual measured mass of a sodium-23 atom is 22.989768 amu . What is the mass defect, m, for a sodium-23 nucleus?

Express your answer in atomic mass units using six significant figures.

Part C

What is the binding energy for a sodium-23 nucleus?

Express your answer numerically in joules per mole.

Part D

What is the binding energy, E, for a sodium-23 nucleus in MeV/nucleon? Recall that 1 MeV=1.60×1013 J.

Express your answer numerically in millions of electron volts per nucleon.

A. 11 electrons

11 protons

12 neutrons

mass = 11*(5.486e-4) + 11*(1.007276) + 12*(1.008665)

mass = 23.1900506 amu

B. DeltaM = 0.2002826 amu

C. Binding energy = deltaM*931.5

BE=186.5632419 MeV

D. Apply E=mc2

2.98911144e-11 J/nucleus ---> MeV/nucleon

8.12259352 MeV/nucleon

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