neet re exam 2021
While doing the classification Mendeleef gave more consideration to
1. The Chemical properties
2. The physical properties
3. The atomic sizes
4. The atomic orbitals
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Who used atomic weights as the basis of classification
1. Mendeleef
2. Lother mayer
3. Mosley
4. (1) and (2)
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Who believed that "atomic property should be the basis for classification
1. Mendeleef
2. Mosley
3. De Chacourtois
4. Pettenkofer
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Who proposed periodic law which is the basis of modern system of classification of elements
1. Mendeleef
2. Lother Meyar
3. (1) and (2)
4. None
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