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

[bolbol2054]

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?

 

[tiny-tim]

Hi bolbol2054!

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.

 

[bolbol2054]

thank you sir

 

[tiny-tim]

don't call me sir!

i'm only a little goldfish! ​