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Dobereiner's Triads

Conceptual Qu...

Question

Conceptual Question
Three elements X, Y, Z form a Dobernier traid. The difference in atomic weights between elements Y, Z is $45$ . If atomic weight of X is $35$ find atomic weight of elements X, Y and Z.

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Solution

According to Dobereiner, the atomic weight of the middle element is nearly the same as average of the atomic weights of other two elements.
Thus answer is $35$ , $80$ , $125$ .

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