Bromine has 2 isotopes ⁷⁹₃₅Br( 49.7%) and ⁸¹₃₅Br (50.3%). Calculate the average atomic mass of bromine atom. (Correct to 3 decimal places)
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Answered by
197
Average atomic mass of bromine
= (79×49.7%) +(81×50.3%)
=79×49.7/100 + 81×50.3/100
=79×0.497+81×0.503
=39.263+40.743
=80.006u
hope it helps..
= (79×49.7%) +(81×50.3%)
=79×49.7/100 + 81×50.3/100
=79×0.497+81×0.503
=39.263+40.743
=80.006u
hope it helps..
Answered by
147
Average atomic mass of an element is calculated by taking the weighted average of the atomic masses of stable Isotopes.
In this case , as we know Bromine has two stable Isotopes, Bromine-79 and Bromine -81.
The isotope with mass 79 is present in 49.7% and isotope with mass 81 is present in 50.3% in nature.
Therefore Average atomic mass of bromine is:
= ( 79x49.7/100) +(81x50.3/100)
=(79x0.497) + (81×0.503)
=39.264 + 50.743
=80.006u
In this case , as we know Bromine has two stable Isotopes, Bromine-79 and Bromine -81.
The isotope with mass 79 is present in 49.7% and isotope with mass 81 is present in 50.3% in nature.
Therefore Average atomic mass of bromine is:
= ( 79x49.7/100) +(81x50.3/100)
=(79x0.497) + (81×0.503)
=39.264 + 50.743
=80.006u
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