Explain Debereiner and Newlands law
Answers
a Dobereiner triads: He make a group of three elements in such a way that the average of atomic masses of 1st and 3rd elements is equal to the atomic mass of the middle one such as Li Na and K.b Newlands law of Octaves: When elements were arranged in such a way that the physical and chemical properties of each eighth ...
Answer:
Dobereiner stated in his law of triads that the arithmetic mean of the atomic masses of the first and third element in a triad would be approximately equal to the atomic mass of the second element in that triad. He also suggested that this law could be extended for other quantifiable properties of elements, such as density.
The first of Dobereiner’s triads was identified in the year 1817 and was constituted by the alkaline earth metals calcium, strontium and barium. Three more triads were identified by the year 1829.
Newland's Law of Octaves states that when Elements are arranged by increasing Atomic Mass, the properties of every eighth Element starting from any Element are a repetition of the properties of the starting Element.