1.

Identify Dobereiner's triads from the following groups of elements having similar chemical properties? S (32.1), Se (79.0), Te (127.6)

Answer»

SOLUTION :S (32.1), (b) SE (79.0), (c) TE (127.6)
`:.` mean of `(a+c)/2=159.70/2= 79.85`
which is APPROXIMATELY equal to ATOMIC mass dt Se. Hence, it forms Dobereiner.s triads.


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