Question
The three stable isotopes of neon: have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of neon.
Solution
Given, the masses of isotopes of neon are, 19.99u, 20.99u and 21.99u.
Relative abundance of the isotopes are 90.51 %, 0.27 % and 9.22 % .
Therefore,
Average atomic mass of neon is,
= = 20.17 u
Relative abundance of the isotopes are 90.51 %, 0.27 % and 9.22 % .
Therefore,
Average atomic mass of neon is,
= = 20.17 u
