1.

X, Y and Z are the elements of a Dobereiner's Triad. If the atomic mass of X is 7 and that of Z is 39, what should be the atomic mass of Y?

Answer»

Solution :Atomic MASS of X = 7
Atomic mass of Z = 39
`:. ` ACCORDING to Dobereiner.s Triad, atomic mass of Y
`=(X+Z)/2=(7 + 39)/2=46/2 =23`
`:.`Atomic mass of Y = 23


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