Atomic Mass Numbers?

The video tutorial explains why atomic masses are not whole numbers, focusing on isotopes and their relative abundance. It uses chlorine and bromine as examples to demonstrate how to calculate the relative atomic mass, which is a weighted mean of the isotopes' masses. The tutorial concludes by emphasizing the importance of isotopes in determining atomic masses.

What are isotopes and how do they relate to atomic mass?

How does the relative abundance of isotopes affect the calculation of relative atomic mass?

Explain why chlorine has a relative atomic mass of 35.5.

What is the significance of the weighted mean in determining atomic mass?

Describe the example of bromine and how its relative atomic mass is calculated.