Question 2.8: Calculating Relative Atomic Mass The element magnesium is co...

Introduction to Chemistry: A Conceptual Approach

Calculating Relative Atomic Mass

The element magnesium is composed of three isotopes: magnesium-24, magnesium-25, and magnesium-26. The mass and percent abundance of each are listed in the following table. Calculate the relative atomic mass of magnesium, and compare your calculated value to the value in the periodic table.

Natural Abundance (%)	Mass (amu)	Isotope
78.99	23.985	²⁴Mg
10.00	24.986	²⁵Mg
11.01	25.983	²⁶Mg

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