Why atomic no. a more fundamental property than atomic mass in deciding the properties of an element?
The atomic no. of an atom is a fundamental property of an atom rather than its atomic mass because in nature, there also exist species known as isobar( two or more than two elements are said to be isobar if they possess equal atomic mass as N14 & C14). Wheras the atomic no. decides their chemical properties which are surely distinguishable.Therefore it seems that distinguishing elements on the basis of their atomic masses will not be correct. Thus we say that atomic no. is funda property of the elements.
