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What are differences between Mendeleev Periodic …

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What are differences between Mendeleev Periodic Table and Mordern Periodic Table ??? Please someone tell me quicky in details . Its urgent ?

Posted by Hardik Singh 5 years, 10 months ago

CBSE > Class 10 > Science

1 answers

Dhruv Mittal 5 years, 10 months ago

1) Mendaleev period table was based on atomic mass and mordern periodic table was based on atomic no. 2). Mendaleev couldn't place hydrogen in his table but in mordern periodic hydrogen was placed in group 1. 3). He couldn't place noble gases but mordern periodic table had it's seperate group

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