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प्रश्न
In Dobereiner’s triads, the atomic weight of the middle element is ______ the of the atomic masses of 1st and 3rd elements.
उत्तर
In Dobereiner’s triads, the atomic weight of the middle element is the average of the atomic masses of 1st and 3rd elements.
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संबंधित प्रश्न
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.
Name the scientist who gave Law of triads in the early classification of elements.
A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and the of C is 39, what should be the atomic mass of B?
A, B and C are the elements of a Dobereiner's triad. If the atomic mass of A is 7 and that of C is 39, what should be the atomic mass of B?
Why was Dobereiner's triad discarded?
With an example, explain Dobereiner's Triads.
What was Dobereiner’s basis, of classification of elements?
Explain why Dobereiner’s method of classification of elements did not hold much weightage for future classification.
Find the odd one out and give its explanation.
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 |
