Calculate the mass defect and the binding energy/nucleon of the nuclide 9/4 Be, which has a mass of 9.01218224 amu. The mass of the proton is 1.00726747 amu and the mass of the neutron is 1.00866490 amu.

I've gotten this far...

mass of proton + mass of nuetron = 2.01594137. but how do i find the mass of the electron?

Then, how do I find the number of nucleons so that I can divide DeltaE by the number of nucelons to give me the binding energy

mass electron = 9.109 x 10^-28 grams. This will be listed in your text or you can google it.

I think its 9.04 x 10 to -12 J.

To calculate the mass defect and binding energy/nucleon of a nuclide, we need to determine the mass of the nucleus and compare it with the sum of the masses of its constituent particles. Here's how you can proceed:

1. Calculate the mass of the electron:
The mass of the electron is not required for these calculations since it is much smaller compared to the masses of protons and neutrons. Therefore, we can neglect the contribution of electrons when determining the mass defect and binding energy/nucleon.

2. Calculate the number of nucleons:
The nuclide 9/4 Be has an atomic number of 4, which represents the number of protons in the nucleus. Since the nuclide is neutral, the number of protons is equal to the number of electrons. Hence, the number of nucleons (protons + neutrons) can be found using the atomic mass number "A." In this case, A = 9.

3. Calculate the mass defect:
The mass defect (Δm) is the difference between the experimental mass of the nuclide and the sum of the individual masses of its constituent particles.

Δm = (mass of protons + mass of neutrons) - mass of the nuclide

Calculate the mass defect using the provided values:
mass of protons = 4 × mass of a proton
mass of neutrons = (9 - 4) × mass of a neutron
mass of the nuclide = 9.01218224 amu

4. Calculate the binding energy/nucleon:
The binding energy (BE) is the energy required to disassemble the nucleus into its individual constituent particles. The binding energy per nucleon (BE/A) provides a measure of the stability of the nucleus.

BE/A = ΔE/N

Where:
ΔE = binding energy (in this case, it is equal to the mass defect in terms of energy using Einstein's mass-energy equivalence equation, E = mc^2)
N = number of nucleons

5. Convert the mass defect to energy:
Use Einstein's mass-energy equivalence equation, E = mc^2, to convert the mass defect to energy:

ΔE = Δm × c^2

Where:
ΔE = binding energy (in joules)
Δm = mass defect (in kilograms)
c = speed of light (approximately 3 × 10^8 m/s)

By following these steps, you should be able to calculate the mass defect and binding energy/nucleon for the given nuclide.