what are the achievements and drawbacks of Mendeleev's periodic table?
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Answered by
231
Achievements:
1. It had periods and groups
2. The sequence was inverted so that elements with similar chemical properties can be grouped together.
3. He predicted the coming of new elements which were not discovered at that time.
Limitations:
1. Hydrogen didn't have a fixed position.
2. isotopes were discovered later and posed a challenge.
3. The atomic mass of elements was not increasing in a regular manner.
1. It had periods and groups
2. The sequence was inverted so that elements with similar chemical properties can be grouped together.
3. He predicted the coming of new elements which were not discovered at that time.
Limitations:
1. Hydrogen didn't have a fixed position.
2. isotopes were discovered later and posed a challenge.
3. The atomic mass of elements was not increasing in a regular manner.
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Answered by
69
Merits:- Mendeelev law predicted the existence of some elements that had not been discovered at that time.
Mendeleev could predict the properties of several elements on the basis of their positions in the periodic table.
Mendeleev periodic could accommodate noble gases.
Demerits:- Could not assign a correct position to hydrogen.
Position of isotopes could not be explained.
Wrong order of atomic masses of some elements could not be explained.
Mendeleev could predict the properties of several elements on the basis of their positions in the periodic table.
Mendeleev periodic could accommodate noble gases.
Demerits:- Could not assign a correct position to hydrogen.
Position of isotopes could not be explained.
Wrong order of atomic masses of some elements could not be explained.
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