Correct definition of Relative atomic mass

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Discussion Overview

The discussion revolves around the definition of Relative Atomic Mass, specifically in the context of a homework question. Participants explore various interpretations and explanations of the term, aiming to clarify its meaning and how to effectively articulate it for maximum marks.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant defines Relative Atomic Mass as "the mass of an atom relative to one atom of carbon-12," expressing concern about the completeness of this definition for scoring full marks.
  • Another participant questions the validity of the first definition, suggesting that carbon-12 has a relative atomic mass of 1 when compared to itself, implying a misunderstanding of the concept.
  • A third participant proposes that Relative Atomic Mass is the "average mass of an element compared to 1/12th of a carbon-12 atom," seeking feedback on this interpretation.
  • Another participant challenges the previous definitions by stating that Relative Atomic Mass can be relative to any atom, not just carbon-12, noting that historical references included oxygen.

Areas of Agreement / Disagreement

Participants express differing views on the definition of Relative Atomic Mass, with no consensus reached on a singular correct explanation. Some definitions are challenged and refined, but multiple interpretations remain present.

Contextual Notes

There are unresolved aspects regarding the historical context of atomic mass references and the implications of choosing different reference atoms. The definitions provided may depend on specific educational contexts or interpretations.

synkk
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Homework Statement


Explain what you understand by the term Relative Atomic Mass

The question is equal to three marks, though i don't think I've put enough for all the marks:

The Attempt at a Solution



The mass of an atom relative to one atom of carbon-12.

I would think that's only equal to one mark, how do i get the other three?
 
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synkk said:

Homework Statement


Explain what you understand by the term Relative Atomic Mass

The question is equal to three marks, though i don't think I've put enough for all the marks:

The Attempt at a Solution



The mass of an atom relative to one atom of carbon-12.

I would think that's only equal to one mark, how do i get the other three?
So carbon-12 has a relative atomic mass of 1 (unity) then (viz, relative to itself)?! I'd not give you the one mark! :/
 
So how could i get receive the three marks?
 
I put: Average mass of an element compared to 1/12th of a carbon-12 atom? Hows that
 
Not bad, but not completely correct either. Relative atomic mass can be relative to any atom, doesn't have to be C-12 - the choice is arbitrary. It was oxygen in the past, it is C-12 now.
 

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