Question

classification of elements based on atomic number is more scientific than that of atomic mass number . justify with an example....​

Answer 1

The atomic mass of a element relates to the nucleus which is present in the centre of the atom. But the properties of elements depend upon the electronic configuration which is linked with atomic number therefore atomic number is a better basis for classification of elements then the atomic mass

Explanation:

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Answer 2

Classification of elements based on atomic number is more scientific than that of atomic mass number.

But why?

• Atomic number represents the number of protons in the nucleus, which in turn determines the identity of an element.

• Whereas, atomic mass is the total number of proton and neutron within the nucleus.

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• When we try to classify all the elements according to chemical properties, many elements have same atomic mass but distinctive atomic number.

• For example: $C_{12}$ (carbon) and $N_{12}$ (nitrogen isotope) are two different elements having same atomic mass. But their atomic number is different (Carbon has 6 atomic number and Nitrogen has 7 atomic number).

• That's why, classification is done on the basis of atomic number.

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