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प्रश्न
What was Dobereiner’s basis, of classification of elements?
उत्तर
Basis of classification was that “there was a close relationship between the properties of an element and its atomic mass”.
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संबंधित प्रश्न
The arrangement of elements in a group of three is known as ________.
The modern periodic table has been evolved through the early attempts of Dobereiner, Newland and Mendeleev. List one advantage and one limitation or all the three attempts.
What were the limitations of Dobereiner's classification of elements?
Did Dobereiners triads also exist in the columns of Newland's Octaves? Compare and find out.
With an example, explain Dobereiner's Triads.
State Dobereiner’s Law of Triads with suitable examples.
In Dobreiner's triads, three elements appear to be arranged in ascending order of their atomic number.
If Dobereiner is related with ‘law of triads’, then Newlands is related with ______.
Match the following.
| 1. | Triads | Newlands |
| 2. | Alkali metal | Calcium |
| 3. | Law of octaves | Henry Moseley |
| 4. | Alkaline earth metal | Sodium |
| 5. | Modern Periodic Law | Dobereiner |
Can the following groups of elements be classified as Döbereiner's triad?
- Na, Si, Cl
- Be, Mg, Ca
Atomic mass of Be 9; Na 23; Mg 24; Si 28; Cl 35; Ca 40 Explain by giving reason.
