X,Y and Zare three members of a Doboreiner's triad . If the atomic mass of X is 7 and that of Z is 39 , what in the atomic mass of Y?

X,Y and Zare three members of a Doboreiner's triad . If the atomic mas

1.	X,Y and Zare three members of a Doboreiner's triad . If the atomic mass of X is 7 and that of Z is 39 , what in the atomic mass of Y?
Answer» 23 7 46 39 Answer :a