Disadvantage of modern periodic table
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Position of hydrogen is not satisfactory, it can be placed either in group I or 17 group of the first period.
It fails to accommodate lathanides and actinides in the main body of the periodic table. These are kept separately at the bottom of the periodic table
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These three disadvantages are of modern periodic Table
1.Hydrogen resembles both the alkali metals and halogens But it has been placed with the alkalis.
2.The lanthanides and actinides have not been placed in the main body of the table.
3.Place of Multivalent elements is not sure in the modern periodic table.
1.Hydrogen resembles both the alkali metals and halogens But it has been placed with the alkalis.
2.The lanthanides and actinides have not been placed in the main body of the table.
3.Place of Multivalent elements is not sure in the modern periodic table.
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