The average atomic mass of naturally occurring neon is 20.18 amu. There are 2 common isotopes of naturally occurring neon as indicated below.
Isotope: Ne-20 Ne-22
Mass Amu: 19.99 21.99
1. Determine the percent abundance of each isotope by using the above information.
2. Determine the number of Ne-22 atoms in a 12.55 g sample of naturally occurring neon.