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What is the average binding energy per nucleon for 40 18 Ar?

Short Answer

Expert verified
Answer: [Value obtained from the Step 4 calculation] MeV/nucleon

Step by step solution

01

Determine the number of protons and neutrons

For 40 18 Ar, the number of protons (atomic number) is 18, and the number of neutrons can be calculated by subtracting the atomic number from the mass number: 40 - 18 = 22 neutrons.
02

Calculate the mass difference

Now, we need to calculate the mass difference between the combined mass of individual protons and neutrons and the actual mass of the nucleus. The mass of a proton is roughly 1.007276466812 amu and the mass of a neutron is roughly 1.008664915 amu. The mass of Argon-40 nucleus is 39.9623831238 amu. We can use these values to find the mass difference: mass difference = (18 * 1.007276466812 amu + 22 * 1.008664915 amu) - 39.9623831238 amu
03

Calculate the total binding energy

To calculate the total binding energy, we'll use the mass difference and the speed of light (c = 2.99792458×10^8 m/s). We'll also need to convert the mass difference from amu to kg. One amu is approximately equal to 1.660539040×10^-27 kg. Thus: total binding energy = mass difference * (1.660539040×10^-27 kg/amu) * (2.99792458×10^8 m/s)^2
04

Calculate the average binding energy per nucleon

Now, we need to divide the total binding energy by the total number of nucleons (protons + neutrons) to find the average binding energy per nucleon: average binding energy per nucleon = total binding energy / (18 + 22) Calculate this value using the numbers obtained in the previous steps to get the average binding energy per nucleon for 40 18 Ar.

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