Why is atomic number considered as an important parameter rather than atomic mass for classifying elements
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Mendeleev's Periodic Table's drawback was due to this reason. If you classify the elements according to their increasing atomic masses, then, there are many problems regarding the placements of isotopes. Isotopes are the atoms of same element, having same atomic number but different mass numbers. So, since they have different mass numbers, you have to place different isotopes of the same element differently, which would distort the shape of the periodic table and also create a mismatch in the properties of elements of the same group. Further, some more problems were created. Atomic mass of potassium is more than that of argon, still potassium was placed before.
Hence, atomic numbers are considered to be more valid for the classification of elements, as the isotopes, are placed in the same place since all isotopes of a particular element have the same atomic number.
Hope my answer is satisfactory...
Thanks!!
Thanks for asking such question...
Mendeleev's Periodic Table's drawback was due to this reason. If you classify the elements according to their increasing atomic masses, then, there are many problems regarding the placements of isotopes. Isotopes are the atoms of same element, having same atomic number but different mass numbers. So, since they have different mass numbers, you have to place different isotopes of the same element differently, which would distort the shape of the periodic table and also create a mismatch in the properties of elements of the same group. Further, some more problems were created. Atomic mass of potassium is more than that of argon, still potassium was placed before.
Hence, atomic numbers are considered to be more valid for the classification of elements, as the isotopes, are placed in the same place since all isotopes of a particular element have the same atomic number.
Hope my answer is satisfactory...
Thanks!!
Answered by
2
The properties of elements depend on the valence electrons in the atom, which in turn depends on the total number of electrons, i.e. atomic number.
Hence, the atomic number is considered a more appropriate parameter than the atomic mass for the classification of elements in the modern periodic
table.
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