Identify the basic requirements that led scientists towards the classification of elements.
(i) Identification of some pattern in different properties of elements
(ii) Rearrangement of elements on the basis of their synthesis
(iii) To get overall idea of the colour of different elements
1
(i) and (iii)
2
Only (i)
3
(ii) and (iii)
4
(i), (ii) and (iii)