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(a) Define atomic mass unit. What is it...

(a) Define atomic mass unit. What is its symbol ?
(b) Define atomic mass of an element.
(c ) What is meant by saying that 'the atomic mass of oxygen is `16`' ?

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The correct Answer is:
a.0.007825j; b. +7.290`Mev//c^(2)c. 2.008665u d. +8.071`meV//c^(2)` e. -0.09780u; f. `-91.10MeV//c^(2)`
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