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