![]() (i) This classification was successful only up to the element calcium. Newlands called it law of octaves because similar relationship exists in the musical notes also. John Newlands proposed the law of octaves by stating that when elements are arranged in order of increasing atomic masses, every eighth element has properties similar to the first. The triads given by Dobereiner were helpful in grouping some elements with similar characteristics together, but he could not arrange all the elements known at that time into triads. In 1829, Dobereiner arranged certain elements with similar properties in groups of three in such a way that the atomic mass of the middle element was nearly the same as the average atomic masses of the first and the third elements. Genesis of Periodic Classification Dobereiner’s Triads.Lakhmir Singh Science Class 8 SolutionsĬlassification of Elements and Periodicity in Properties Class 11 Notes Chemistry Chapter 3.PS Verma and VK Agarwal Biology Class 9 Solutions.NCERT Solutions for Class 9 Foundation of IT.NCERT Solutions for Class 9 Social Science. ![]() NCERT Solutions for Class 10 Foundation of Information Technology.NCERT Solutions For Class 10 Hindi Kritika.NCERT Solutions For Class 10 Hindi Kshitiz. ![]()
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