Chapter 5: Periodic Classifications of Elements

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Periodic Classifications of Elements

Question:

What were the limitations of Newlands’ law of octaves?

Answer:

Newland law of octaves was applicable up to calcium. After calcium, every eighth element does not have properties similar to the first element. He assumed that only 56 elements existed in nature and the elements that were discovered later, do not fit this classification. Newland placed two elements in one slot. For example, he placed cobalt and nickel in the same slot and they are placed in the same column as fluorine, chlorine, and bromine that have different chemical properties. The iron which resembles the properties of cobalt is placed far from it.


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