the three stable isotopes of 90.51% , 0.27% and 9.22% the atomic masses of the three isotopes are 19.99 u , 20 .99 u and 21.99u respectively the average atomic mass of neon will be

Naturally occuring chlorine is a mixture of two isotopes. In every sample of this element 75.77% of the atoms are 35Cl and 24.23% are atoms of 37Cl. The accurately measured atomic mass of 35Cl is 34.9689 u and that of 37Cl is 36.9659 u. From these data. Calculate the average atomic mass of chlorine.

Naturally occuring boron has two isotopes of masses 10 amu and 11 amu. Calculate the percentage of each isotope if the average atomic mass of boron is 10.2 .

Chlorine is a mixture of two isotopes with atomic masses 35u and 37u which are present in the ratio of 3:1. Find out the average atomic mass.

The abundance of three isotopes of oxygen (atomic mass 16.12) contains 8, 9, 10 neutrons respectively. One of the heaviest isotopes has 2% abundance. The other two are :