A sample of an element X contains two isotopes `._(8)^(16)X and ._(8)^(18)X`. If the average atomic mass of this sample of the element be 16.2 u, calculate the percentage of the two isotopes in this sample.

(a) What are radioactive isotopes ? Give two examples of radioactive isotopes (b) Give any two uses of ratioactive isotopes (c) An element Z contains two naturally occuring isotopes ._(17)^(35) Z and ._(17)^(37)Z . If the average atomic mass of this element be 35.5 u, calculate the percentage of two isotopes.

A sample of oxygen atoms contain only ._(8)O^(16) and ._(8)O^(18) isotopes. If the average atomic mass of the sample is 16.8, then identify the options which is/are correct ?

Boron has two isotopes, B-10 and B-11. The average atomic mass of boron is found to be 10.80u. Calculate the percentage of abundance of these isotopes.

An element is found in nature in two isotopic forms with mass numbers (A-1) and (A+3). If the average atomic mass of the element is found to be A, then the relative abundance of the heavier isotope in the nature will be :

boron has two isotopes B-10,B-11. The average atomic mass of boron is found to be 10.80u. Calculate the percentage abundance of B^(10) isotope :-