Mendeleev's Periodic Table | Merits & Demerits of Mendeleev's Periodic Table

Mendeleev's Periodic Table | Merits & Demerits of Mendeleev's Periodic Table
Mendeleev's Periodic Table
Merits
1. He was first successful scientist who classified all the known elements.
2. He kept some blank spaces in his periodic table.
3. When noble gas was discovered they fitted very well without disturbing the Mendeleev's Periodic Table.
Mendeleev's Periodic Table
Demerits
1. He could not able give proper place to Hydrogen in his periodic table.
2. He kept Manganese in the halogen group while it shows different properties.
3. At certain place, he placed elements of higher atomic mass first then smaller one.
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