SECTION-C
27. (a) Name three alkali earth metals which follow Newland's law of Octaves
b) The Newland's law of Octaves was not accepted by the scientists. What
are the linitations of Newlands classification of elements?
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Limitations of Newland's Law of Octaves Elements with dissimilar properties were grouped together. For example, the halogens were grouped with some metals such as cobalt, nickel and platinum. Newland's law of octaves held true only for elements up to calcium.
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- (a) This triad was made up of the alkali metals lithium, sodium and potassium.
- (b) The major limitations of Newlands' law of octaves were : (i) It was applicable to only lighter elements having atomic masses upto 40 u, i.e., upto calcium. After calcium, the first and the eighth element did not have similar properties.
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