Define isotope. If bromine atom is avabile in the form of two isotopes 79BR35 AND 81br35 is 49.7% and 50.3% respectively. Calculate the average atomic mass of bromine.
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Isotopes are the elements having the same atomic number but different mass numbers.
We have,
The atomic number of Br = 35
Given,
Mass numbers of ⁷⁹Br and ⁸¹Br are 79 and 81.
Average atomic mass = (79 × 49.7 + 81 × 50.3)/100
= (3926.3 + 4074.3) / 100
= 8000.6 / 100
= 80.006 amu
Thus the average atomic mass of Br is 80.006 amu.
We have,
The atomic number of Br = 35
Given,
Mass numbers of ⁷⁹Br and ⁸¹Br are 79 and 81.
Average atomic mass = (79 × 49.7 + 81 × 50.3)/100
= (3926.3 + 4074.3) / 100
= 8000.6 / 100
= 80.006 amu
Thus the average atomic mass of Br is 80.006 amu.
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