Question

Rearrange the Column 2 and 3 so as to match with the Column 1.

Column 1	Column 2	Column 3
(1) Triad	Concentrated mass and +ve charge	Thomson
(2) Octave	Average of the atomic masses of first and third elements	Newlands
	Properties of the eighth element are similar to first	Dobereiner

Answer 1

Column 1	Column 2	Column 3
(1) Triad	Average of the atomic masses of first and third elements	Dobereiner
(2) Octave	Properties of the eighth element are similar to first	Newlands