2.2 - Relative mass

Question 1

What is Relative isotopic mass?

Answer 1

The mass of an isotope relative to 1/12th of the mass of an atom of carbon-12

Question 2

What is the Relative atomic mass?

Answer 2

The weighted mean mass of an atom of an element relative to 1/12th of the mass of an atom of carbon-12

Question 3

What does the weighted mean mass take into account?

Answer 3

• The percentage abundance of each isotope
• The relative isotopic mass of each isotope

Question 4

How is mass-to-charge ratio (m/z) calculated?

Answer 4

Relative mass of ion / relative charge on ion