SHORTANSWERTYPEQQ 1. Write short notes on the following(i) Dobereiner'

1.	SHORTANSWERTYPEQQ 1. Write short notes on the following(i) Dobereiner's triads principle.(ii) Newland's octaves principle.
Answer» Dobereiner'sLaw ofTriads.Dobereiner, in 1817 suggested a relationship between the properties of elements and their atomic weights. According toDobereiner, the atomic weight of the middle element is nearly the same as average of the atomic weights of other two elements Law ofoctaves. Law ofoctaves, in chemistry, the generalization made by the English chemist J.A.R.Newlandsin 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.

SHORTANSWERTYPEQQ 1. Write short notes on the following(i) Dobereiner's triads principle.(ii) Newland's octaves principle.

Answer»

Dobereiner'sLaw ofTriads.Dobereiner, in 1817 suggested a relationship between the properties of elements and their atomic weights. According toDobereiner, the atomic weight of the middle element is nearly the same as average of the atomic weights of other two elements

Law ofoctaves. Law ofoctaves, in chemistry, the generalization made by the English chemist J.A.R.Newlandsin 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.

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