C1 : Relative Atomic Mass

Question 1

Isotopes

Answer 1

Element with different numbers of neutrons

Question 2

What is the relative atomic mass

Answer 2

The average of the mass numbers of the different isotopes
It is weighted for the abundance of each isotope (how common each isotope is)

Question 3

How do we find the relative atomic mass

Answer 3

(mass of iso 1 x percent abundance of iso 1) + (mass of iso 2 x percent abundance of iso 2) / 100