ICSE Class 9 Answered
Drawback of newlands law of octave
Asked by anjalisingh49832 | 05 Nov, 2019, 07:54: PM
Expert Answer
Drawbacks of Newland's law of octave:
- Newland could arrange elements only up to calcium, out of the total 56 elements known.
- After calcium, every eighth element did not possess properties similar to that of the first.
- Only 56 elements were known at the time of Newlands, but later several elements were discovered.
- In order to fit the existing element arrangement, Newlands placed two elements in the same position which differed in their properties.
- For example Iron, an element which resembles cobalt and nickel in its properties is placed far away from these elements.
- The periodic table did not include inert gases because they were not discovered then.
Answered by Varsha | 06 Nov, 2019, 09:32: AM
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