How to find the relative atomic mass from isotopes?

The relative atomic mass is the mass of one atom compared to the mass of all the the other atoms in an element. The relative atomic mass is usually expressed in atomic mass units. This means that the relative atomic mass of an element is its mass in the same units as an atom of hydrogen.

How to find the atomic mass of isotopes?

When two or more atoms of the same element combine, they form a chemical compound. Now, the atomic mass of the resulting chemical compound is the sum of the atomic masses of the atoms that have formed it. Therefore, if there are two isotopes of an element, the relative atomic mass of the lighter one can be found by subtracting the heavier one from the sum of the atomic masses of all the isotopes of the same element.

How to determine the isotopic ratio of an element?

An isotopic ratio is the ratio of the number of atoms of one isotope to that of another. The isotopic composition of an element is expressed as a ratio of the relative abundances of the different isotopes of an element, expressed as the number of atoms of one isotope present in the sample, to the total number of atoms of all the isotopes of that element.

How to find the isotopic ratio of an element?

First, make a list of all chemical elements you need and their relative atomic masses (ratios). You can find the relative atomic masses of all chemical elements on the Periodic Table of the Elements website. If you’re interested in the relative atomic masses of heavier elements, you can use an online calculator. Unfortunately, the relative atomic masses of isotopes tend to vary quite a lot, so you might need to try different methods to find the ratio. Here are a few examples:

How to find the atomic mass of an isomer?

Aside from elemental, isotopic, and molecular mass, the atomic mass of an isomer is also important. An isomer is a form of chemical structure with the same number of atoms in it, but with different properties.