How do you estimate the mass of a nucleus?

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SUMMARY

The mass of a nucleus with a radius of 2.80 x 10-15 m is estimated to be 2.11 x 10-26 kg. To approach this calculation, one should start with the known radius of a proton, which is 0.857 femtometers (fm), and its mass of 1.67 x 10-27 kg. The volume of the nucleus can be calculated using the formula for the volume of a sphere, which is essential for determining the mass based on the density of nuclear matter.

PREREQUISITES
  • Understanding of nuclear physics concepts, specifically nuclear density.
  • Familiarity with the volume formula for a sphere.
  • Knowledge of the mass and radius of a proton.
  • Basic skills in unit conversion, particularly between meters and femtometers.
NEXT STEPS
  • Research the formula for the volume of a sphere to apply it in nuclear mass calculations.
  • Study the concept of nuclear density and how it relates to mass estimation.
  • Learn about the properties of protons and neutrons, including their mass and size.
  • Explore resources on estimating the mass of larger nuclei using similar principles.
USEFUL FOR

Students studying nuclear physics, educators teaching atomic structure, and anyone interested in understanding the calculations related to nuclear mass estimation.

erinec
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Homework Statement


Estimate the mass of a nucleus with a radius of 2.80 * 10^-15m.


Homework Equations


I do not know if there is an 'equation' for this.


The Attempt at a Solution


The answer is 2.11*10^-26.. but I don't even know how to approach this question.
 
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I'd start with the radius of a proton - .857 fm (femtometer) and its mass 1.67*10-27 kg then figure the volume of the 2.8 fm volume they want you to fill.

http://en.wikipedia.org/wiki/Proton
 

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