Question

what was the number of elements in each set into which determines classified the elements
a) 2
b) 3
c) 8
d) 18
​

Answer 1

Dobereiner grouped elements in a set of 3 called triads. Thus each group had 3 elements. Dobereiner classified elements based on their properties. He illustrates the relationship between the atomic masses of elements and their properties with his law of triads.

SO THE ANS IS c}3

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