Do Different Materials with the Same Mass Have the Same Number of Protons?

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    Mass Protons
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Discussion Overview

The discussion revolves around whether different materials with the same mass contain the same number of protons. Participants explore the relationship between mass, protons, and neutrons in various substances, including iron, aluminum, hydrogen, and wood.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant questions if 1 kg of iron contains the same number of protons as 1 kg of aluminum, hydrogen, and wood, and whether mass can be defined by the number of protons and neutrons.
  • Another participant suggests that since a neutron weighs almost the same as a proton, mass could be defined using the total number of protons and neutrons, indicating that this approach would be fairly accurate with minimal errors due to binding energy.

Areas of Agreement / Disagreement

The discussion includes differing perspectives on how mass relates to the number of protons and neutrons, and no consensus is reached regarding the initial question.

Contextual Notes

Participants mention potential errors related to binding energy but do not resolve the implications of these errors on the overall discussion.

bolbol2054
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my question is
Does 1 kg of iron contain the same number of protons as 1kg of aluminium,hydrogen and wood
Can we define mass of matter with no of protons and neutrons it contains?
 
Last edited:
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Hi bolbol2054! :smile:

A neutron weighs almost exactly the same as a proton, and most elements have more neutrons than protons, so you would have to define mass of matter with the number of protons and neutrons (P + N) it contains.

If you did, it would be pretty accurate …

the errors (due to "binding energy") would be well under 1%: see the tables in http://en.wikipedia.org/wiki/Bindin..._experimentally_measured_atom_nuclide_masses" for some detailed figures. :wink:
 
Last edited by a moderator:
thank you sir
 
don't call me sir!

i'm only a little goldfish! :biggrin:
 

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