definition merits and demerits of modern periodic table
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merits
1. it gives the position of isotopes
2. all the elements are arranged according to atomic number which is more relevant then arrange them in order of increasing atomic mass
demerits
1. no position was given to hydrogen
2. Lanthanide and actinide series are placed out of table
1. it gives the position of isotopes
2. all the elements are arranged according to atomic number which is more relevant then arrange them in order of increasing atomic mass
demerits
1. no position was given to hydrogen
2. Lanthanide and actinide series are placed out of table
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