Write the limitations of Newland's law of octave?
Answers
Limitations of law of octaves: The law of octaves has the following limitations ; (A) The law of octaves was found to be applicable only upto calcium. It was not applicable to elements of higher atomic masses. ... (C) Newlands placed two elements in the same slot to fit elements in the table.He also placed some unlike elements under the same slot. For example, cobalt and nickel are placed in the same slot and in the column of fluorine, chlorine and bromine. But cobalt and nickel have properties quite different from fluorine, chlorine and bromine. Similarly, iron which has resemblances with cobalt and nickel in its properties has been placed for away from these elements.
Thus, it was realized that Newlands’ law of octaves worked well only with lighter elements. Therefore, this classification was rejected.
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(1) The law was applicable to element upto calcium (ca)only.
(2)It contained only 56 element,further it was assumed by newlands that only 56 elements existed in nature and no more element would be discovered in the future.
(3) In order to fit element into the table,Newland adjusted two elements in the same column as fluorine,chlorine and bromine which have very different properties than these elements.Iron ,which resembles cobalt and nickel in properties,has been placed differently away from these element
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