sarkari result neet

Triads means 1. Small groups of Three elements 2. Small groups of Four elements 3. Small groups of Five elements 4. Small groups of Six elements

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The first classification of elements is attempted by 1. Dobereiner 2. Mendeleff 3. Mosley 4. John A.R. Newlands

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According Mendeleef periodic law the proper ties of elements are the periodic functions of their …… 1. Atomic numbers 2. Atomic weights 3. Atomic sizes 4. Atomic volumes

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While doing the classification Lother meyer gave more consideration to 1. The chemical properties 2. The atomic numbers 3. The physical properties 4. The atomic Nucleus

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