Medium
Explain the contribution of Newlands to the periodic table.
(N/A) John Alexander Newlands in $1865$ proposed the Law of Octaves.
- Law: "Every eighth element has properties similar to the first element."
- The relationship is analogous to the musical scale,where every eighth note resembles the first. For his work,he was later awarded the Davy Medal in $1887$ by the Royal Society,London.
- Law: "Every eighth element has properties similar to the first element."
- The relationship is analogous to the musical scale,where every eighth note resembles the first. For his work,he was later awarded the Davy Medal in $1887$ by the Royal Society,London.
| Element | $Li, Be, B, C, N, O, F$ |
| At. wt. | $7, 9, 11, 12, 14, 16, 19$ |
| Element | $Na, Mg, Al, Si, P, S, Cl$ |
| At. wt. | $23, 24, 27, 29, 31, 32, 35.5$ |
| Element | $K, Ca$ |
| At. wt. | $39, 40$ |
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Mendeleev's periodic law is based on
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View SolutionGiven below are the atomic masses of the elements:
Element $Li$ $Na$ $Cl$ $K$ $Ca$ $Br$ $Sr$ $I$ $Ba$ Atomic Mass $(g \cdot mol^{-1})$ $7$ $23$ $35.5$ $39$ $40$ $80$ $88$ $127$ $137$
Which of the following does not form a $Dobereiner's$ triad?
| Element | $Li$ | $Na$ | $Cl$ | $K$ | $Ca$ | $Br$ | $Sr$ | $I$ | $Ba$ |
|---|---|---|---|---|---|---|---|---|---|
| Atomic Mass $(g \cdot mol^{-1})$ | $7$ | $23$ | $35.5$ | $39$ | $40$ | $80$ | $88$ | $127$ | $137$ |
Which of the following does not form a $Dobereiner's$ triad?
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View SolutionThe modern periodic table,based on the experiment of atomic number which highlights the significance of atomic number,is associated with:
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View SolutionWhat was the basis for Mendeleev's classification of elements in his periodic table?
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View Solution$Li, Na, K$ form a Dobereiner's triad. If the atomic masses of $Li$ and $K$ are $7$ and $39$ respectively,what will be the atomic mass of $Na$?
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