Question

Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %.
Calculate the atomic mass of magnesium.

Answer 1

[24.3050*(0.7899)] + [24.9858*(0.1000)] + [25.9826*(0.1101)] = ? = atomic mass Mg

Answer 2

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Answer 3

24.55778376

Answer 4

55.3

Answer 5

24.31 amu