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Atomic Weight Calculator
The atomic weight is the average mass of an atom along with abundance percentage. The atomic weight of an atom is measured by the amount of isotopes present in it.
Formula to calculate atomic weight is given by:
Example: An atom possess 2 isotopes in which the 1st isotope has a mass of 18 amu (atomic mass units) and abundance of 65%. The second isotope has a mass of 20 amu and abundance of 40%. Calculate the atomic weight of the atom.
Solution:
Given:
Massa = 18 amu
Fracta = 65%
Massb = 20 amu
Fractb = 40%
We know the formula to calculate atomic weight = Massa x Fracta + Massb x Fractb
Inserting values in the formula = (18 x 0.65) + (20 x 0.40)
= 11.7 + 8
= 19.7
Hence, the atomic weight for the given atom = 19.7 amu
Use our below atomic weight calculator to find out atomic weight instantly. Enter the input values and click calculate to get the answer.
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