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x,y and z are the elements of a Dober...

x,y and z are the elements of a Dobereiner 's tried .If the atomic mass of `'x' ` is 7 and that of 'z' in 39. what should be the atomic mass of the 'y' ?

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The Atomic mass of x= 7. The atomic mass z= 39
x,y,z form Dobereiner triad
`therefore ` Atomic of y = Average of x and `z= (7+39)/(2) =(46)/(2 ) =23`
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