Atomic mass of X and Z is 25 and 45 respectively. If X, Y and Z is Dobereiner's Triad. What will be the atomic number of Y?

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Solution

The correct option is B
35

Since Y is the middle element of the triad, its mass should be the average of 25 and 45, i.e. 35

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Atomic mass of X and Z are 25 and 45 respectively. If X, Y and Z are Dobereiner's Triad. What will be the atomic mass of Y?

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