Symbols Br3579Br and Br79Br can be written, whereas symbols Br7935Br and Br35Br are not acceptable. Answer briefly. - Chemistry

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Answer in Brief

Symbols `""_35^79"Br"` and `""^79"Br"` can be written, whereas symbols `""_79^35"Br"` and `""^35"Br"` are not acceptable. Answer briefly.

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Solution

The general convention of representing an element along with its atomic mass (A) and atomic number (Z) is  `""_"Z"^"A""X"`.

Hence, `""_35^79"Br"` is acceptable but `""_79^35 "Br"` is not acceptable

`""^79"Br"` can be written but `""^35"Br"` cannot be written because the atomic number of an element is constant, but the atomic mass of an element depends upon the relative abundance of its isotopes. Hence, it is necessary to mention the atomic mass of an element.

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Chapter 2: Structure of Atom - EXERCISES [Page 71]

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NCERT Chemistry Part 1 and 2 Class 11
Chapter 2 Structure of Atom
EXERCISES | Q 2.41 | Page 71

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