Boron occurs in nature in the form of two isotopes `underset(5)overset(11)B` and `underset(5)overset(10)B` in ratio of `81%` and 19% respectively. Calculate its average atomic mass.

Boron' occurs in nature in the form of two isotopes '_5^(11)B' and '_5^(10)B' in ratio of 81 and 19 respectively. Calculate its average atomic máss.

Lithium exists in nature in the form of two isotopes, Li-6 and Li-7 with atomic masses 6.0151u and 7.0160u and the percentages 8.24 and 91.76 respectively. Calculate average atomic mass.

Nitrogen occurs in nature in the form of two isotopes with atomic mass 14 and 15 respectively. If average atomic mass of nitrogen is 14.0067, what is the % abundabce of the two isotopes ?

Nitrogen occurs in nature in the form of two isotopes with atomic mass 14 and 15 respectively. If average atomic mass of nitrogen is 14.0067, what is the % abundabce of the two isotopes ?