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Define relative atomic mass ....

Define relative atomic mass .

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(i) Relative atomic mass of an element is the ratio between the average mass of its isotopes to `(1)/(12^(th))` part of the mass of a carbon - 12 atom .
(ii) It is denoted as Ar.
(iii) It is otherwise called " standart atomic weight ".
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The stable isotope of carbon (C-12) with atomic mass 12 is used as the standard for measuring the relative atomic mass of an element.

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Knowledge Check

  • Which one of the following element is used as the standard for measuring the relative atomic mass of an element in now a days?

    A
    `""_(1)H^(2)`
    B
    `""_(6)O^(12)`
    C
    `C-12`
    D
    `C-14`

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