How to calculate the average atomic mass of two isotopes of an element?Explain with examples.
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The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass number of 35 amu. To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together.
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if an element occurs in isotopic form, then we have to know the percentage of each isotopic form and then calculate the average mass.
for example,chlorine occurs in two isotopic form with mass 35u and 37u in the ratio 3:1.
so the average atomic mass will be,
=(35 × 75/100 + 37 ×25/100)
=(105/4 + 37/4)
=142/4
=35.5u.
HOPE THIS HELPED YOU.
for example,chlorine occurs in two isotopic form with mass 35u and 37u in the ratio 3:1.
so the average atomic mass will be,
=(35 × 75/100 + 37 ×25/100)
=(105/4 + 37/4)
=142/4
=35.5u.
HOPE THIS HELPED YOU.
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