Symbols $$_{35}^{79}\textrm{Br}\: and\: _{}^{79}\textrm{Br}$$ can be written, whereas symbols $$_{79}^{35}\textrm{Br}\: and\: _{}^{35}\textrm{Br}$$ are not acceptable. Answer briefly.

Asked by Abhisek | 1 year ago |  78

##### Solution :-

The general convention followed while representing elements along with their atomic masses (A),

and their atomic numbers (Z) is $$_{Z}^{A}\textrm{X}.$$

Therefore, $$_{35}^{79}\textrm{Br}$$  is acceptable but $$_{79}^{35}\textrm{Br}$$ is not.

$$_{}^{79}\textrm{Br}$$ is an acceptable representation but $$_{}^{35}\textrm{Br}$$  is not since the atomic numbers of elements are constant but mass numbers are not (due to the existence isotopes).

Answered by Pragya Singh | 1 year ago

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