Question

By observing the correlation in the
first pair complete the second pair.
Dobereiner Triad: : Newlands law._______​

Answer 1

Answer:

Dobereiner triad Newlands law

Answer 2

The second pair will be  Newlands law: Octaves by observing the correlation.

Explanation:

• Dobereiner's Triad and Newlands' Law of Octaves are older models of the classification of the periodic table. Due to some disadvantages in them, Mendeleev's modern periodic table is widely accepted.
• According to Dobereiner's Triad, when atoms of elements are arranged in increasing order in groups of three (triad), then the atomic mass of the middle element will be equal to the arithmetic mean of the first and third elements in the group.
• In Newlands' law of Octaves, the elements are arranged in a group of eights (octaves) where all the elements in the group will have properties similar to those of the first element.