[shanker]

can someone please confirm which is correct out of the following two statements:

1.All atoms of the same element have the same relative atomic mass.

2.All atoms of the same element have the same atomic number.

i believe number 1 is correct because the relative atomic mass takes into account the average of each element's isotopes and should therefore be equal for each atom.

however number 2 is also correct in my opinion because i know the proton number does not change, but the number of neutrons.


Please help ))

[Borek]

i believe number 1 is correct because the relative atomic mass takes into account the average of each element's isotopes and should therefore be equal for each atom.

One atom weight 1, other atom weight 2. They weight 1.5 on average. None of the atoms weight 1.5.