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Chemistry-please help

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The relative mass of a proton is 1 and the relative mass of a neutron is 1. 1)Why do we use the term "relative mass" instead of mass? Is it because the mass of a proton is compared to the mass of a carbon-12 atom?
2) Can we say that the relative mass of an atom is 2 (proton+neutron)?
3) Is "relative mass" the same as "relative atomic mass"?

Please urgently help. Thanks.

  • Chemistry-please help -

    Relative mass is mass relative to 1/12 of Carbon-12. We use because it relates to a common unit (Atomic Mass Unit).
    2) yes.
    3) yes.

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