Question

If bromine atom is available in the form of, say, two
isotopes 79/35 Br (49.7%) and 81/35 Br(50.3%), calculate
the average atomic mass of bromine atom.​

Answer 1

Explanation:

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Answer 2

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Percentage of 79/35 Br isotope = 49.7

Percentage of 81/35 Br isotope = 50.3

Average atomic mass =

$= \: \: \frac{49.7 \times 79 + 50.3 \times 81}{100}$

$= \: \frac{3926.3 + 4074.3}{100}$

$\frac{8000.6}{100}$

$80.006$

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# Isotopes = Isotopes are atom of the same element which have the same atomic number but different mass numbers.